---
title: "Restoring / Updating CFW"
redirect_from:
  - restoring-cfw
---

{% include toc title="目次" %}

### 必読事項

This page prepares consoles with an existing modern boot9strap installation for reinstallation and/or updating of custom firmware applications. It can also be used in the event of a lost or corrupted SD card.

Your SD card must be formatted as FAT32 to follow this guide, or else the 3DS will be unable to recognize it. If your SD card is not yet properly formatted, use one of these pages to format it, depending on your operating system: [Windows](formatting-sd-(windows)), [Mac](formatting-sd-(mac)), [Linux](formatting-sd-(linux)).

### 必要なもの
* The latest release of [Luma3DS](https://github.com/LumaTeam/Luma3DS/releases/latest) (the Luma3DS `.zip` file)

### 手順

1. パソコンにSDカードを入れます
1. Copy `boot.3dsx` and `boot.firm` from the Luma3DS `.zip` to the root of your SD card, replacing any existing files
  + SDカードのルートとは、Nintendo 3DSのフォルダなどがある最初の項目のことであり、フォルダの中ではありません。
1. 再度、SDカードを本体に挿入してください。
1. デバイスの電源を入れます
  + If you see the Luma3DS configuration menu, press (Start) to save and reboot

The latest version of Luma3DS has now been installed on your SD card and on internal memory.
{: .notice--success}
___

If you wish to re-install or update other homebrew applications, continue to [Finalizing Setup](finalizing-setup)
{: .notice--primary}