Choose SysNAND (full) options -> Restore SysNAND (full) .
Before attempting any deep system installations or modifications, you must create a backup of your console's unique internal NAND. This is your insurance policy against a permanent brick. Insert the prepared SD card into your 3DS.
You downloaded a NAND image meant for a different model. An Old 3DS NAND image cannot be installed on a New 3DS, and vice versa. 3ds nand download install
If your system is bricked or you need to revert to a previous state, you can restore this dump. Steps to Restore NAND Power on holding START , launch GodMode9 . Select the Backup: Navigate to [0:] SDCARD -> gm9 -> backups .
Once complete, press to continue, then press B repeatedly to return to the main menu. Choose SysNAND (full) options -> Restore SysNAND (full)
Navigate to [S: Department] , select essential.exefs , press to copy it, and paste it into your [0: SDMC] directory as an extra safety measure. Press Start to reboot your console. Securing Your Files
The process, documented on the 3DS Hacks Guide , involves downloading the appropriate CTRTransfer image via torrent. The image consists of a .bin and a .bin.sha file, which you place in the /gm9/out/ folder on your SD card. You then boot into GodMode9, navigate to SysNAND Options , then CTRNAND Transfer , and select Auto CTRNAND Transfer . The script will handle the rest, effectively reinstalling the core system software. Insert the prepared SD card into your 3DS
: The NAND flash memory in the Nintendo 3DS stores the console's operating system, settings, and game data. It's a critical component for the console to function.
The console's data is stored in two different areas:
Before attempting any NAND operation, you need specific tools.
: The 3DS is region-locked, meaning a console purchased in Japan can normally only play Japanese games. By modifying the system's region data—primarily by replacing the SecureInfo_A file, a small file containing the console's region information—you can change the console's region. This process typically involves downloading a CTRTransfer image for the target region and flashing it to the system with custom firmware (CFW). It's important to note that you cannot directly use a full, encrypted NAND backup from another console; instead, you must copy and modify individual decrypted partitions.