**Custom Firmware** ("CFW") ist eine vollständige Software-Modifikation zu deinem 3DS, vergleichbar mit dem "Administrator-Zugriff" auf einem Computer. Es erlaubt dir, alles zu tun, was der 3DS physisch tun kann, anstatt von Nintendo eingeschränkt zu sein.
* Modification of games ("ROM hacks") through [LayeredFS](https://github.com/knight-ryu12/godmode9-layeredfs-usage/wiki/Using-Luma3DS'-layeredfs-(Only-version-8.0-and-higher))
* Save data editing, backup, and restore
* Emulation of older consoles, as well as native playback of DS and GBA games
* While the risks of bricking have been minimized over the years, **we are not responsible for anything that goes wrong with your device**. Incorrect file placement will not brick your device, but reckless behavior might.
* This guide is compatible with every retail device in the Nintendo 3DS family of consoles (including the New 3DS series and the 2DS), regardless of region or firmware.
* While we believe that custom firmware is safe for online use, there have been online network bans in the past, primarily for cheating and suspicious eShop behavior.
* Following this guide alone should not result in data loss, but SD card corruption is always a possibility. You should make a backup of your SD card contents if you have important data.
* You will need a working SD card in your 3DS, as well as the ability to write files to the SD card. The 3DS can read SD cards formatted as MBR/FAT32.
+ You may want to check your SD card for errors using [H2testw (Windows)](h2testw-(windows)), [F3 (Linux)](f3-(linux)), or [F3XSwift (Mac)](f3xswift-(mac)).
* If you are using Windows to move files to/from the SD card, you may want to [enable file extensions](file-extensions-(windows)) to avoid misnaming files.