diff --git a/src/core/file_sys/archive_backend.h b/src/core/file_sys/archive_backend.h
index a425a383f..1a57e12d3 100644
--- a/src/core/file_sys/archive_backend.h
+++ b/src/core/file_sys/archive_backend.h
@@ -167,24 +167,28 @@ public:
     /**
      * Tries to open the archive of this type with the specified path
      * @param path Path to the archive
+     * @param program_id the program ID of the client that requests the operation
      * @return An ArchiveBackend corresponding operating specified archive path.
      */
-    virtual ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) = 0;
+    virtual ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) = 0;
 
     /**
      * Deletes the archive contents and then re-creates the base folder
      * @param path Path to the archive
      * @param format_info Format information for the new archive
+     * @param program_id the program ID of the client that requests the operation
      * @return ResultCode of the operation, 0 on success
      */
-    virtual ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) = 0;
+    virtual ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                              u64 program_id) = 0;
 
     /**
      * Retrieves the format info about the archive with the specified path
      * @param path Path to the archive
+     * @param program_id the program ID of the client that requests the operation
      * @return Format information about the archive or error code
      */
-    virtual ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const = 0;
+    virtual ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const = 0;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_extsavedata.cpp b/src/core/file_sys/archive_extsavedata.cpp
index e1de76f87..2839483f5 100644
--- a/src/core/file_sys/archive_extsavedata.cpp
+++ b/src/core/file_sys/archive_extsavedata.cpp
@@ -220,7 +220,8 @@ Path ArchiveFactory_ExtSaveData::GetCorrectedPath(const Path& path) {
     return {binary_data};
 }
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_ExtSaveData::Open(const Path& path) {
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_ExtSaveData::Open(const Path& path,
+                                                                            u64 program_id) {
     std::string fullpath = GetExtSaveDataPath(mount_point, GetCorrectedPath(path)) + "user/";
     if (!FileUtil::Exists(fullpath)) {
         // TODO(Subv): Verify the archive behavior of SharedExtSaveData compared to ExtSaveData.
@@ -236,7 +237,8 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_ExtSaveData::Open(cons
 }
 
 ResultCode ArchiveFactory_ExtSaveData::Format(const Path& path,
-                                              const FileSys::ArchiveFormatInfo& format_info) {
+                                              const FileSys::ArchiveFormatInfo& format_info,
+                                              u64 program_id) {
     auto corrected_path = GetCorrectedPath(path);
 
     // These folders are always created with the ExtSaveData
@@ -258,7 +260,8 @@ ResultCode ArchiveFactory_ExtSaveData::Format(const Path& path,
     return RESULT_SUCCESS;
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_ExtSaveData::GetFormatInfo(const Path& path) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_ExtSaveData::GetFormatInfo(const Path& path,
+                                                                       u64 program_id) const {
     std::string metadata_path = GetExtSaveDataPath(mount_point, path) + "metadata";
     FileUtil::IOFile file(metadata_path, "rb");
 
diff --git a/src/core/file_sys/archive_extsavedata.h b/src/core/file_sys/archive_extsavedata.h
index 46d849d33..7dc345c84 100644
--- a/src/core/file_sys/archive_extsavedata.h
+++ b/src/core/file_sys/archive_extsavedata.h
@@ -24,9 +24,10 @@ public:
         return "ExtSaveData";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
     const std::string& GetMountPoint() const {
         return mount_point;
diff --git a/src/core/file_sys/archive_ncch.cpp b/src/core/file_sys/archive_ncch.cpp
index 9c563d38c..4aeaf8fca 100644
--- a/src/core/file_sys/archive_ncch.cpp
+++ b/src/core/file_sys/archive_ncch.cpp
@@ -269,7 +269,8 @@ bool NCCHFile::SetSize(const u64 size) const {
 
 ArchiveFactory_NCCH::ArchiveFactory_NCCH() {}
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_NCCH::Open(const Path& path) {
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_NCCH::Open(const Path& path,
+                                                                     u64 program_id) {
     if (path.GetType() != LowPathType::Binary) {
         LOG_ERROR(Service_FS, "Path need to be Binary");
         return ERROR_INVALID_PATH;
@@ -290,14 +291,16 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_NCCH::Open(const Path&
 }
 
 ResultCode ArchiveFactory_NCCH::Format(const Path& path,
-                                       const FileSys::ArchiveFormatInfo& format_info) {
+                                       const FileSys::ArchiveFormatInfo& format_info,
+                                       u64 program_id) {
     LOG_ERROR(Service_FS, "Attempted to format a NCCH archive.");
     // TODO: Verify error code
     return ResultCode(ErrorDescription::NotAuthorized, ErrorModule::FS, ErrorSummary::NotSupported,
                       ErrorLevel::Permanent);
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_NCCH::GetFormatInfo(const Path& path) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_NCCH::GetFormatInfo(const Path& path,
+                                                                u64 program_id) const {
     // TODO(Subv): Implement
     LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
     return ResultCode(-1);
diff --git a/src/core/file_sys/archive_ncch.h b/src/core/file_sys/archive_ncch.h
index 864b569f2..7d352ea09 100644
--- a/src/core/file_sys/archive_ncch.h
+++ b/src/core/file_sys/archive_ncch.h
@@ -97,9 +97,10 @@ public:
         return "NCCH";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 };
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_other_savedata.cpp b/src/core/file_sys/archive_other_savedata.cpp
index 9655c6650..1c3b071ba 100644
--- a/src/core/file_sys/archive_other_savedata.cpp
+++ b/src/core/file_sys/archive_other_savedata.cpp
@@ -64,7 +64,7 @@ ArchiveFactory_OtherSaveDataPermitted::ArchiveFactory_OtherSaveDataPermitted(
     : sd_savedata_source(std::move(sd_savedata)) {}
 
 ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataPermitted::Open(
-    const Path& path) {
+    const Path& path, u64 /*client_program_id*/) {
     MediaType media_type;
     u64 program_id;
     CASCADE_RESULT(std::tie(media_type, program_id), ParsePathPermitted(path));
@@ -78,13 +78,13 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataPermitted
 }
 
 ResultCode ArchiveFactory_OtherSaveDataPermitted::Format(
-    const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
+    const Path& path, const FileSys::ArchiveFormatInfo& format_info, u64 program_id) {
     LOG_ERROR(Service_FS, "Attempted to format a OtherSaveDataPermitted archive.");
     return ERROR_INVALID_PATH;
 }
 
 ResultVal<ArchiveFormatInfo> ArchiveFactory_OtherSaveDataPermitted::GetFormatInfo(
-    const Path& path) const {
+    const Path& path, u64 /*client_program_id*/) const {
     MediaType media_type;
     u64 program_id;
     CASCADE_RESULT(std::tie(media_type, program_id), ParsePathPermitted(path));
@@ -102,7 +102,7 @@ ArchiveFactory_OtherSaveDataGeneral::ArchiveFactory_OtherSaveDataGeneral(
     : sd_savedata_source(std::move(sd_savedata)) {}
 
 ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataGeneral::Open(
-    const Path& path) {
+    const Path& path, u64 /*client_program_id*/) {
     MediaType media_type;
     u64 program_id;
     CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
@@ -116,7 +116,7 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataGeneral::
 }
 
 ResultCode ArchiveFactory_OtherSaveDataGeneral::Format(
-    const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
+    const Path& path, const FileSys::ArchiveFormatInfo& format_info, u64 /*client_program_id*/) {
     MediaType media_type;
     u64 program_id;
     CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
@@ -130,7 +130,7 @@ ResultCode ArchiveFactory_OtherSaveDataGeneral::Format(
 }
 
 ResultVal<ArchiveFormatInfo> ArchiveFactory_OtherSaveDataGeneral::GetFormatInfo(
-    const Path& path) const {
+    const Path& path, u64 /*client_program_id*/) const {
     MediaType media_type;
     u64 program_id;
     CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
diff --git a/src/core/file_sys/archive_other_savedata.h b/src/core/file_sys/archive_other_savedata.h
index d80725158..e3e8f83c3 100644
--- a/src/core/file_sys/archive_other_savedata.h
+++ b/src/core/file_sys/archive_other_savedata.h
@@ -21,9 +21,10 @@ public:
         return "OtherSaveDataPermitted";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     std::string mount_point;
@@ -40,9 +41,10 @@ public:
         return "OtherSaveDataGeneral";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     std::string mount_point;
diff --git a/src/core/file_sys/archive_savedata.cpp b/src/core/file_sys/archive_savedata.cpp
index 6e518af8b..c1046e2f5 100644
--- a/src/core/file_sys/archive_savedata.cpp
+++ b/src/core/file_sys/archive_savedata.cpp
@@ -16,20 +16,20 @@ ArchiveFactory_SaveData::ArchiveFactory_SaveData(
     std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata)
     : sd_savedata_source(std::move(sd_savedata)) {}
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const Path& path) {
-    return sd_savedata_source->Open(
-        Core::System::GetInstance().Kernel().GetCurrentProcess()->codeset->program_id);
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const Path& path,
+                                                                         u64 program_id) {
+    return sd_savedata_source->Open(program_id);
 }
 
 ResultCode ArchiveFactory_SaveData::Format(const Path& path,
-                                           const FileSys::ArchiveFormatInfo& format_info) {
-    return sd_savedata_source->Format(
-        Core::System::GetInstance().Kernel().GetCurrentProcess()->codeset->program_id, format_info);
+                                           const FileSys::ArchiveFormatInfo& format_info,
+                                           u64 program_id) {
+    return sd_savedata_source->Format(program_id, format_info);
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_SaveData::GetFormatInfo(const Path& path) const {
-    return sd_savedata_source->GetFormatInfo(
-        Core::System::GetInstance().Kernel().GetCurrentProcess()->codeset->program_id);
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SaveData::GetFormatInfo(const Path& path,
+                                                                    u64 program_id) const {
+    return sd_savedata_source->GetFormatInfo(program_id);
 }
 
 } // namespace FileSys
diff --git a/src/core/file_sys/archive_savedata.h b/src/core/file_sys/archive_savedata.h
index 41aa6f189..591a3b900 100644
--- a/src/core/file_sys/archive_savedata.h
+++ b/src/core/file_sys/archive_savedata.h
@@ -20,10 +20,11 @@ public:
         return "SaveData";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
 
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     std::string mount_point;
diff --git a/src/core/file_sys/archive_sdmc.cpp b/src/core/file_sys/archive_sdmc.cpp
index d6f3935eb..cff4cd395 100644
--- a/src/core/file_sys/archive_sdmc.cpp
+++ b/src/core/file_sys/archive_sdmc.cpp
@@ -376,18 +376,21 @@ bool ArchiveFactory_SDMC::Initialize() {
     return true;
 }
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMC::Open(const Path& path) {
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMC::Open(const Path& path,
+                                                                     u64 program_id) {
     auto archive = std::make_unique<SDMCArchive>(sdmc_directory);
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
 ResultCode ArchiveFactory_SDMC::Format(const Path& path,
-                                       const FileSys::ArchiveFormatInfo& format_info) {
+                                       const FileSys::ArchiveFormatInfo& format_info,
+                                       u64 program_id) {
     // This is kind of an undesirable operation, so let's just ignore it. :)
     return RESULT_SUCCESS;
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMC::GetFormatInfo(const Path& path) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMC::GetFormatInfo(const Path& path,
+                                                                u64 program_id) const {
     // TODO(Subv): Implement
     LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
     return ResultCode(-1);
diff --git a/src/core/file_sys/archive_sdmc.h b/src/core/file_sys/archive_sdmc.h
index f6c70bfcc..637d4dc16 100644
--- a/src/core/file_sys/archive_sdmc.h
+++ b/src/core/file_sys/archive_sdmc.h
@@ -55,9 +55,10 @@ public:
         return "SDMC";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     std::string sdmc_directory;
diff --git a/src/core/file_sys/archive_sdmcwriteonly.cpp b/src/core/file_sys/archive_sdmcwriteonly.cpp
index a1f5a416c..b9534f12d 100644
--- a/src/core/file_sys/archive_sdmcwriteonly.cpp
+++ b/src/core/file_sys/archive_sdmcwriteonly.cpp
@@ -49,19 +49,22 @@ bool ArchiveFactory_SDMCWriteOnly::Initialize() {
     return true;
 }
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMCWriteOnly::Open(const Path& path) {
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SDMCWriteOnly::Open(const Path& path,
+                                                                              u64 program_id) {
     auto archive = std::make_unique<SDMCWriteOnlyArchive>(sdmc_directory);
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
 ResultCode ArchiveFactory_SDMCWriteOnly::Format(const Path& path,
-                                                const FileSys::ArchiveFormatInfo& format_info) {
+                                                const FileSys::ArchiveFormatInfo& format_info,
+                                                u64 program_id) {
     // TODO(wwylele): hwtest this
     LOG_ERROR(Service_FS, "Attempted to format a SDMC write-only archive.");
     return ResultCode(-1);
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMCWriteOnly::GetFormatInfo(const Path& path) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMCWriteOnly::GetFormatInfo(const Path& path,
+                                                                         u64 program_id) const {
     // TODO(Subv): Implement
     LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
     return ResultCode(-1);
diff --git a/src/core/file_sys/archive_sdmcwriteonly.h b/src/core/file_sys/archive_sdmcwriteonly.h
index 9cd38d96f..050fc19c8 100644
--- a/src/core/file_sys/archive_sdmcwriteonly.h
+++ b/src/core/file_sys/archive_sdmcwriteonly.h
@@ -46,9 +46,10 @@ public:
         return "SDMCWriteOnly";
     }
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     std::string sdmc_directory;
diff --git a/src/core/file_sys/archive_selfncch.cpp b/src/core/file_sys/archive_selfncch.cpp
index dc2c61666..0f8dd8065 100644
--- a/src/core/file_sys/archive_selfncch.cpp
+++ b/src/core/file_sys/archive_selfncch.cpp
@@ -278,18 +278,20 @@ void ArchiveFactory_SelfNCCH::Register(Loader::AppLoader& app_loader) {
         data.banner = std::make_shared<std::vector<u8>>(std::move(buffer));
 }
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SelfNCCH::Open(const Path& path) {
-    auto archive = std::make_unique<SelfNCCHArchive>(
-        ncch_data[Core::System::GetInstance().Kernel().GetCurrentProcess()->codeset->program_id]);
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SelfNCCH::Open(const Path& path,
+                                                                         u64 program_id) {
+    auto archive = std::make_unique<SelfNCCHArchive>(ncch_data[program_id]);
     return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
 }
 
-ResultCode ArchiveFactory_SelfNCCH::Format(const Path&, const FileSys::ArchiveFormatInfo&) {
+ResultCode ArchiveFactory_SelfNCCH::Format(const Path&, const FileSys::ArchiveFormatInfo&,
+                                           u64 program_id) {
     LOG_ERROR(Service_FS, "Attempted to format a SelfNCCH archive.");
     return ERROR_INVALID_PATH;
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_SelfNCCH::GetFormatInfo(const Path&) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SelfNCCH::GetFormatInfo(const Path&,
+                                                                    u64 program_id) const {
     LOG_ERROR(Service_FS, "Attempted to get format info of a SelfNCCH archive");
     return ERROR_INVALID_PATH;
 }
diff --git a/src/core/file_sys/archive_selfncch.h b/src/core/file_sys/archive_selfncch.h
index 245691a5d..779e7e75a 100644
--- a/src/core/file_sys/archive_selfncch.h
+++ b/src/core/file_sys/archive_selfncch.h
@@ -37,9 +37,10 @@ public:
     std::string GetName() const override {
         return "SelfNCCH";
     }
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
     /// Mapping of ProgramId -> NCCHData
diff --git a/src/core/file_sys/archive_systemsavedata.cpp b/src/core/file_sys/archive_systemsavedata.cpp
index 9e823c332..cef42e561 100644
--- a/src/core/file_sys/archive_systemsavedata.cpp
+++ b/src/core/file_sys/archive_systemsavedata.cpp
@@ -52,7 +52,8 @@ Path ConstructSystemSaveDataBinaryPath(u32 high, u32 low) {
 ArchiveFactory_SystemSaveData::ArchiveFactory_SystemSaveData(const std::string& nand_path)
     : base_path(GetSystemSaveDataContainerPath(nand_path)) {}
 
-ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SystemSaveData::Open(const Path& path) {
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SystemSaveData::Open(const Path& path,
+                                                                               u64 program_id) {
     std::string fullpath = GetSystemSaveDataPath(base_path, path);
     if (!FileUtil::Exists(fullpath)) {
         // TODO(Subv): Check error code, this one is probably wrong
@@ -63,14 +64,16 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SystemSaveData::Open(c
 }
 
 ResultCode ArchiveFactory_SystemSaveData::Format(const Path& path,
-                                                 const FileSys::ArchiveFormatInfo& format_info) {
+                                                 const FileSys::ArchiveFormatInfo& format_info,
+                                                 u64 program_id) {
     std::string fullpath = GetSystemSaveDataPath(base_path, path);
     FileUtil::DeleteDirRecursively(fullpath);
     FileUtil::CreateFullPath(fullpath);
     return RESULT_SUCCESS;
 }
 
-ResultVal<ArchiveFormatInfo> ArchiveFactory_SystemSaveData::GetFormatInfo(const Path& path) const {
+ResultVal<ArchiveFormatInfo> ArchiveFactory_SystemSaveData::GetFormatInfo(const Path& path,
+                                                                          u64 program_id) const {
     // TODO(Subv): Implement
     LOG_ERROR(Service_FS, "Unimplemented GetFormatInfo archive {}", GetName());
     return ResultCode(-1);
diff --git a/src/core/file_sys/archive_systemsavedata.h b/src/core/file_sys/archive_systemsavedata.h
index 52eb6c630..e72ecce3a 100644
--- a/src/core/file_sys/archive_systemsavedata.h
+++ b/src/core/file_sys/archive_systemsavedata.h
@@ -20,9 +20,10 @@ class ArchiveFactory_SystemSaveData final : public ArchiveFactory {
 public:
     explicit ArchiveFactory_SystemSaveData(const std::string& mount_point);
 
-    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path) override;
-    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info) override;
-    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path) const override;
+    ResultVal<std::unique_ptr<ArchiveBackend>> Open(const Path& path, u64 program_id) override;
+    ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
+                      u64 program_id) override;
+    ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
     std::string GetName() const override {
         return "SystemSaveData";
diff --git a/src/core/hle/service/cecd/cecd.cpp b/src/core/hle/service/cecd/cecd.cpp
index df217d76e..85f3e50ce 100644
--- a/src/core/hle/service/cecd/cecd.cpp
+++ b/src/core/hle/service/cecd/cecd.cpp
@@ -1362,7 +1362,7 @@ Module::Module(Core::System& system) : system(system) {
 
     // Open the SystemSaveData archive 0x00010026
     FileSys::Path archive_path(cecd_system_savedata_id);
-    auto archive_result = systemsavedata_factory.Open(archive_path);
+    auto archive_result = systemsavedata_factory.Open(archive_path, 0);
 
     // If the archive didn't exist, create the files inside
     if (archive_result.Code() != FileSys::ERR_NOT_FORMATTED) {
@@ -1370,10 +1370,10 @@ Module::Module(Core::System& system) : system(system) {
         cecd_system_save_data_archive = std::move(archive_result).Unwrap();
     } else {
         // Format the archive to create the directories
-        systemsavedata_factory.Format(archive_path, FileSys::ArchiveFormatInfo());
+        systemsavedata_factory.Format(archive_path, FileSys::ArchiveFormatInfo(), 0);
 
         // Open it again to get a valid archive now that the folder exists
-        cecd_system_save_data_archive = systemsavedata_factory.Open(archive_path).Unwrap();
+        cecd_system_save_data_archive = systemsavedata_factory.Open(archive_path, 0).Unwrap();
 
         /// Now that the archive is formatted, we need to create the root CEC directory,
         /// eventlog.dat, and CEC/MBoxList____
diff --git a/src/core/hle/service/cfg/cfg.cpp b/src/core/hle/service/cfg/cfg.cpp
index 8c6859bb3..dba000257 100644
--- a/src/core/hle/service/cfg/cfg.cpp
+++ b/src/core/hle/service/cfg/cfg.cpp
@@ -531,15 +531,15 @@ ResultCode Module::LoadConfigNANDSaveFile() {
 
     // Open the SystemSaveData archive 0x00010017
     FileSys::Path archive_path(cfg_system_savedata_id);
-    auto archive_result = systemsavedata_factory.Open(archive_path);
+    auto archive_result = systemsavedata_factory.Open(archive_path, 0);
 
     // If the archive didn't exist, create the files inside
     if (archive_result.Code() == FileSys::ERR_NOT_FORMATTED) {
         // Format the archive to create the directories
-        systemsavedata_factory.Format(archive_path, FileSys::ArchiveFormatInfo());
+        systemsavedata_factory.Format(archive_path, FileSys::ArchiveFormatInfo(), 0);
 
         // Open it again to get a valid archive now that the folder exists
-        cfg_system_save_data_archive = systemsavedata_factory.Open(archive_path).Unwrap();
+        cfg_system_save_data_archive = systemsavedata_factory.Open(archive_path, 0).Unwrap();
     } else {
         ASSERT_MSG(archive_result.Succeeded(), "Could not open the CFG SystemSaveData archive!");
 
diff --git a/src/core/hle/service/fs/archive.cpp b/src/core/hle/service/fs/archive.cpp
index 4322f6653..184c319f0 100644
--- a/src/core/hle/service/fs/archive.cpp
+++ b/src/core/hle/service/fs/archive.cpp
@@ -36,7 +36,7 @@ ArchiveBackend* ArchiveManager::GetArchive(ArchiveHandle handle) {
 }
 
 ResultVal<ArchiveHandle> ArchiveManager::OpenArchive(ArchiveIdCode id_code,
-                                                     FileSys::Path& archive_path) {
+                                                     FileSys::Path& archive_path, u64 program_id) {
     LOG_TRACE(Service_FS, "Opening archive with id code 0x{:08X}", static_cast<u32>(id_code));
 
     auto itr = id_code_map.find(id_code);
@@ -44,7 +44,8 @@ ResultVal<ArchiveHandle> ArchiveManager::OpenArchive(ArchiveIdCode id_code,
         return FileSys::ERROR_NOT_FOUND;
     }
 
-    CASCADE_RESULT(std::unique_ptr<ArchiveBackend> res, itr->second->Open(archive_path));
+    CASCADE_RESULT(std::unique_ptr<ArchiveBackend> res,
+                   itr->second->Open(archive_path, program_id));
 
     // This should never even happen in the first place with 64-bit handles,
     while (handle_map.count(next_handle) != 0) {
@@ -193,28 +194,29 @@ ResultVal<u64> ArchiveManager::GetFreeBytesInArchive(ArchiveHandle archive_handl
 
 ResultCode ArchiveManager::FormatArchive(ArchiveIdCode id_code,
                                          const FileSys::ArchiveFormatInfo& format_info,
-                                         const FileSys::Path& path) {
+                                         const FileSys::Path& path, u64 program_id) {
     auto archive_itr = id_code_map.find(id_code);
     if (archive_itr == id_code_map.end()) {
         return UnimplementedFunction(ErrorModule::FS); // TODO(Subv): Find the right error
     }
 
-    return archive_itr->second->Format(path, format_info);
+    return archive_itr->second->Format(path, format_info, program_id);
 }
 
 ResultVal<FileSys::ArchiveFormatInfo> ArchiveManager::GetArchiveFormatInfo(
-    ArchiveIdCode id_code, FileSys::Path& archive_path) {
+    ArchiveIdCode id_code, FileSys::Path& archive_path, u64 program_id) {
     auto archive = id_code_map.find(id_code);
     if (archive == id_code_map.end()) {
         return UnimplementedFunction(ErrorModule::FS); // TODO(Subv): Find the right error
     }
 
-    return archive->second->GetFormatInfo(archive_path);
+    return archive->second->GetFormatInfo(archive_path, program_id);
 }
 
 ResultCode ArchiveManager::CreateExtSaveData(MediaType media_type, u32 high, u32 low,
                                              const std::vector<u8>& smdh_icon,
-                                             const FileSys::ArchiveFormatInfo& format_info) {
+                                             const FileSys::ArchiveFormatInfo& format_info,
+                                             u64 program_id) {
     // Construct the binary path to the archive first
     FileSys::Path path =
         FileSys::ConstructExtDataBinaryPath(static_cast<u32>(media_type), high, low);
@@ -228,7 +230,7 @@ ResultCode ArchiveManager::CreateExtSaveData(MediaType media_type, u32 high, u32
 
     auto ext_savedata = static_cast<FileSys::ArchiveFactory_ExtSaveData*>(archive->second.get());
 
-    ResultCode result = ext_savedata->Format(path, format_info);
+    ResultCode result = ext_savedata->Format(path, format_info, program_id);
     if (result.IsError())
         return result;
 
diff --git a/src/core/hle/service/fs/archive.h b/src/core/hle/service/fs/archive.h
index f335f650d..c1dd2bd1b 100644
--- a/src/core/hle/service/fs/archive.h
+++ b/src/core/hle/service/fs/archive.h
@@ -60,9 +60,11 @@ public:
      * Opens an archive
      * @param id_code IdCode of the archive to open
      * @param archive_path Path to the archive, used with Binary paths
+     * @param program_id the program ID of the client that requests the operation
      * @return Handle to the opened archive
      */
-    ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code, FileSys::Path& archive_path);
+    ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code, FileSys::Path& archive_path,
+                                         u64 program_id);
 
     /**
      * Closes an archive
@@ -172,20 +174,23 @@ public:
      * @param id_code The id of the archive to format
      * @param format_info Format information about the new archive
      * @param path The path to the archive, if relevant.
+     * @param program_id the program ID of the client that requests the operation
      * @return ResultCode 0 on success or the corresponding code on error
      */
     ResultCode FormatArchive(ArchiveIdCode id_code, const FileSys::ArchiveFormatInfo& format_info,
-                             const FileSys::Path& path = FileSys::Path());
+                             const FileSys::Path& path, u64 program_id);
 
     /**
      * Retrieves the format info about the archive of the specified type and path.
      * The format info is supplied by the client code when creating archives.
      * @param id_code The id of the archive
      * @param archive_path The path of the archive, if relevant
+     * @param program_id the program ID of the client that requests the operation
      * @return The format info of the archive, or the corresponding error code if failed.
      */
     ResultVal<FileSys::ArchiveFormatInfo> GetArchiveFormatInfo(ArchiveIdCode id_code,
-                                                               FileSys::Path& archive_path);
+                                                               FileSys::Path& archive_path,
+                                                               u64 program_id);
 
     /**
      * Creates a blank SharedExtSaveData archive for the specified extdata ID
@@ -194,11 +199,12 @@ public:
      * @param low The low word of the extdata id to create
      * @param smdh_icon the SMDH icon for this ExtSaveData
      * @param format_info Format information about the new archive
+     * @param program_id the program ID of the client that requests the operation
      * @return ResultCode 0 on success or the corresponding code on error
      */
     ResultCode CreateExtSaveData(MediaType media_type, u32 high, u32 low,
                                  const std::vector<u8>& smdh_icon,
-                                 const FileSys::ArchiveFormatInfo& format_info);
+                                 const FileSys::ArchiveFormatInfo& format_info, u64 program_id);
 
     /**
      * Deletes the SharedExtSaveData archive for the specified extdata ID
diff --git a/src/core/hle/service/fs/fs_user.cpp b/src/core/hle/service/fs/fs_user.cpp
index f9b883fe7..bbcc2e6fd 100644
--- a/src/core/hle/service/fs/fs_user.cpp
+++ b/src/core/hle/service/fs/fs_user.cpp
@@ -35,7 +35,10 @@ namespace Service::FS {
 
 void FS_USER::Initialize(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x0801, 0, 2);
-    rp.PopPID();
+    u32 pid = rp.PopPID();
+
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    slot->program_id = system.Kernel().GetProcessById(pid)->codeset->program_id;
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
     rb.Push(RESULT_SUCCESS);
@@ -93,7 +96,10 @@ void FS_USER::OpenFileDirectly(Kernel::HLERequestContext& ctx) {
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
 
-    ResultVal<ArchiveHandle> archive_handle = archives.OpenArchive(archive_id, archive_path);
+    ClientSlot* slot = GetSessionData(ctx.Session());
+
+    ResultVal<ArchiveHandle> archive_handle =
+        archives.OpenArchive(archive_id, archive_path, slot->program_id);
     if (archive_handle.Failed()) {
         LOG_ERROR(Service_FS,
                   "Failed to get a handle for archive archive_id=0x{:08X} archive_path={}",
@@ -309,7 +315,9 @@ void FS_USER::OpenArchive(Kernel::HLERequestContext& ctx) {
               archive_path.DebugStr());
 
     IPC::RequestBuilder rb = rp.MakeBuilder(3, 0);
-    ResultVal<ArchiveHandle> handle = archives.OpenArchive(archive_id, archive_path);
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    ResultVal<ArchiveHandle> handle =
+        archives.OpenArchive(archive_id, archive_path, slot->program_id);
     rb.Push(handle.Code());
     if (handle.Succeeded()) {
         rb.PushRaw(*handle);
@@ -385,7 +393,9 @@ void FS_USER::FormatSaveData(Kernel::HLERequestContext& ctx) {
     format_info.number_files = number_files;
     format_info.total_size = block_size * 512;
 
-    rb.Push(archives.FormatArchive(ArchiveIdCode::SaveData, format_info));
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    rb.Push(archives.FormatArchive(ArchiveIdCode::SaveData, format_info, archive_path,
+                                   slot->program_id));
 }
 
 void FS_USER::FormatThisUserSaveData(Kernel::HLERequestContext& ctx) {
@@ -404,7 +414,9 @@ void FS_USER::FormatThisUserSaveData(Kernel::HLERequestContext& ctx) {
     format_info.total_size = block_size * 512;
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
-    rb.Push(archives.FormatArchive(ArchiveIdCode::SaveData, format_info));
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    rb.Push(archives.FormatArchive(ArchiveIdCode::SaveData, format_info, FileSys::Path(),
+                                   slot->program_id));
 
     LOG_TRACE(Service_FS, "called");
 }
@@ -446,7 +458,9 @@ void FS_USER::CreateExtSaveData(Kernel::HLERequestContext& ctx) {
     format_info.total_size = 0;
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
-    rb.Push(archives.CreateExtSaveData(media_type, save_high, save_low, icon, format_info));
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    rb.Push(archives.CreateExtSaveData(media_type, save_high, save_low, icon, format_info,
+                                       slot->program_id));
     rb.PushMappedBuffer(icon_buffer);
 
     LOG_DEBUG(Service_FS,
@@ -535,7 +549,10 @@ void FS_USER::CreateLegacySystemSaveData(Kernel::HLERequestContext& ctx) {
 void FS_USER::InitializeWithSdkVersion(Kernel::HLERequestContext& ctx) {
     IPC::RequestParser rp(ctx, 0x861, 1, 2);
     const u32 version = rp.Pop<u32>();
-    rp.PopPID();
+    u32 pid = rp.PopPID();
+
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    slot->program_id = system.Kernel().GetProcessById(pid)->codeset->program_id;
 
     LOG_WARNING(Service_FS, "(STUBBED) called, version: 0x{:08X}", version);
 
@@ -595,8 +612,8 @@ void FS_USER::GetFormatInfo(Kernel::HLERequestContext& ctx) {
     LOG_DEBUG(Service_FS, "archive_path={}", archive_path.DebugStr());
 
     IPC::RequestBuilder rb = rp.MakeBuilder(5, 0);
-
-    auto format_info = archives.GetArchiveFormatInfo(archive_id, archive_path);
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    auto format_info = archives.GetArchiveFormatInfo(archive_id, archive_path, slot->program_id);
     rb.Push(format_info.Code());
     if (format_info.Failed()) {
         LOG_ERROR(Service_FS, "Failed to retrieve the format info");
@@ -664,7 +681,9 @@ void FS_USER::ObsoletedCreateExtSaveData(Kernel::HLERequestContext& ctx) {
     format_info.total_size = 0;
 
     IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
-    rb.Push(archives.CreateExtSaveData(media_type, save_high, save_low, icon, format_info));
+    ClientSlot* slot = GetSessionData(ctx.Session());
+    rb.Push(archives.CreateExtSaveData(media_type, save_high, save_low, icon, format_info,
+                                       slot->program_id));
     rb.PushMappedBuffer(icon_buffer);
 
     LOG_DEBUG(Service_FS,
diff --git a/src/core/hle/service/fs/fs_user.h b/src/core/hle/service/fs/fs_user.h
index 90c0ed7ec..97b45714b 100644
--- a/src/core/hle/service/fs/fs_user.h
+++ b/src/core/hle/service/fs/fs_user.h
@@ -15,7 +15,16 @@ namespace Service::FS {
 
 class ArchiveManager;
 
-class FS_USER final : public ServiceFramework<FS_USER> {
+struct ClientSlot : public Kernel::SessionRequestHandler::SessionDataBase {
+    // We retrieves program ID for client process on FS::Initialize(WithSDKVersion)
+    // Real 3DS matches program ID and process ID based on data registered by loader via fs:REG, so
+    // theoretically the program ID for FS client and for process codeset can mismatch if the loader
+    // behaviour is modified. Since we don't emulate fs:REG mechanism, we assume the program ID is
+    // the same as codeset ID and fetch from there directly.
+    u64 program_id = 0;
+};
+
+class FS_USER final : public ServiceFramework<FS_USER, ClientSlot> {
 public:
     explicit FS_USER(Core::System& system);
 
diff --git a/src/core/hle/service/ptm/ptm.cpp b/src/core/hle/service/ptm/ptm.cpp
index 8d6dc6cad..9ba14d407 100644
--- a/src/core/hle/service/ptm/ptm.cpp
+++ b/src/core/hle/service/ptm/ptm.cpp
@@ -143,16 +143,16 @@ static void WriteGameCoinData(GameCoin gamecoin_data) {
     FileSys::ArchiveFactory_ExtSaveData extdata_archive_factory(nand_directory, true);
 
     FileSys::Path archive_path(ptm_shared_extdata_id);
-    auto archive_result = extdata_archive_factory.Open(archive_path);
+    auto archive_result = extdata_archive_factory.Open(archive_path, 0);
     std::unique_ptr<FileSys::ArchiveBackend> archive;
 
     FileSys::Path gamecoin_path("/gamecoin.dat");
     // If the archive didn't exist, create the files inside
     if (archive_result.Code() == FileSys::ERR_NOT_FORMATTED) {
         // Format the archive to create the directories
-        extdata_archive_factory.Format(archive_path, FileSys::ArchiveFormatInfo());
+        extdata_archive_factory.Format(archive_path, FileSys::ArchiveFormatInfo(), 0);
         // Open it again to get a valid archive now that the folder exists
-        archive = extdata_archive_factory.Open(archive_path).Unwrap();
+        archive = extdata_archive_factory.Open(archive_path, 0).Unwrap();
         // Create the game coin file
         archive->CreateFile(gamecoin_path, sizeof(GameCoin));
     } else {
@@ -176,7 +176,7 @@ static GameCoin ReadGameCoinData() {
     FileSys::ArchiveFactory_ExtSaveData extdata_archive_factory(nand_directory, true);
 
     FileSys::Path archive_path(ptm_shared_extdata_id);
-    auto archive_result = extdata_archive_factory.Open(archive_path);
+    auto archive_result = extdata_archive_factory.Open(archive_path, 0);
     if (!archive_result.Succeeded()) {
         LOG_ERROR(Service_PTM, "Could not open the PTM SharedExtSaveData archive!");
         return default_game_coin;
@@ -205,7 +205,7 @@ Module::Module() {
     std::string nand_directory = FileUtil::GetUserPath(FileUtil::UserPath::NANDDir);
     FileSys::ArchiveFactory_ExtSaveData extdata_archive_factory(nand_directory, true);
     FileSys::Path archive_path(ptm_shared_extdata_id);
-    auto archive_result = extdata_archive_factory.Open(archive_path);
+    auto archive_result = extdata_archive_factory.Open(archive_path, 0);
     // If the archive didn't exist, write the default game coin file
     if (archive_result.Code() == FileSys::ERR_NOT_FORMATTED) {
         WriteGameCoinData(default_game_coin);