3DS:Rebuild Title Database

This article will guide you in rebuilding the  file in your SD card.

is a file on both the 3DS' SD card and its CTRNAND which contains a list of all installed 3DS titles for its respective place (e.g. The SD card's  only has entries for titles installed to the SD card). For more information, check out 3dbrew.

What you need

 * The latest release of save3ds for your operating system
 * A version of Python 3.8 or later
 * A 3DS console with custom firmware
 * seeddb.bin

Section I - Preparing the files

 * 1) Launch GodMode9 by holding  on boot
 * 2) Navigate into
 * 3) Press  on   then select Copy to 0:/gm9/out
 * 4) Press  to continue
 * 5) Press  once to return to the main menu
 * 6) Navigate into   ->
 * 7) Press  on , then select Copy to 0:/gm9/out
 * 8) Turn the 3DS off
 * 9) Insert the SD card into your computer
 * 10) Go to the GitHub repo for Rebuild Title Database
 * 11) Click the Code button, then click Download ZIP
 * 12) Extract the contents of the downloaded   into a folder
 * 13) * This folder will be referred to as the "rebuild folder" from now on
 * 14) Go to   ->   on your SD card
 * 15) Copy   and   into the rebuild folder
 * 16) Create a folder called   in your user directory
 * 17) * On Windows, the user directory is
 * 18) * On macOS, the user directory is
 * 19) * On Linux, the user directory is  (often shortened to  )
 * 20) Copy   into the new   folder
 * 21) Copy   from the save3ds   file into the rebuild folder

Section II - Rebuilding the Database

 * 1) Navigate to the rebuild folder in file explorer
 * 2) Hold SHIFT and right-click anywhere in the folder's empty space, then click the option that opens a terminal, PowerShell, or Command Prompt
 * 3) In this new window, enter the following commands one at a time:
 * 4) * If this does not print the Python version, it is either not installed correctly, or the wrong command was used. Please read the note above.
 * 5) * replace  with your SD card's drive letter
 * 6) * replace  with your SD card's drive letter
 * 7) If you didn't get any errors, your apps should reappear on the HOME Menu immediately
 * 8) * If they only appear in System Settings -> Data Management and they have an X through their icons there, run faketik.
 * 9) * If they do not appear anywhere in the system, you should check your SD card for errors - the apps are likely gone.
 * 1) * replace  with your SD card's drive letter
 * 2) If you didn't get any errors, your apps should reappear on the HOME Menu immediately
 * 3) * If they only appear in System Settings -> Data Management and they have an X through their icons there, run faketik.
 * 4) * If they do not appear anywhere in the system, you should check your SD card for errors - the apps are likely gone.
 * 1) * If they do not appear anywhere in the system, you should check your SD card for errors - the apps are likely gone.

Troubleshooting

 * boot9.bin is missing in
 * You are not using boot9strap. You should switch to boot9strap or consult the documentation of the bootloader you use, such as fastboot3DS.
 * The first command in Section II gave the error
 * Make sure you are in the rebuild folder and that you extracted the contents of  into it.
 * Once this is fixed, delete the out folder and try the command again.
 * The second or third command in Section II failed
 * Make sure you have  and   in the rebuild folder.
 * Make sure the SD card is inserted and you can view and edit its contents.