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Revision as of 04:39, 10 August 2025 by Ihaveahax (talk | contribs) (Created page with "This guide will show how to clean up a 3DS with custom firmware and get a setup similar to a clean install. {{Critical|text=This will format and delete everything on the console and SD card!}} == Instructions == === Section I - Check Luma3DS version === Press and hold {{B|Select}} while turning on the console to check the Luma3DS version. {{Luma3DS update table}} ==== Nothing happens or a different custom firmware is being used ==== Follow 3dsguide:index|3DS Hacks...")
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This guide will show how to clean up a 3DS with custom firmware and get a setup similar to a clean install.

Critical icon This will format and delete everything on the console and SD card!

Instructions

Section I - Check Luma3DS version

Press and hold Select while turning on the console to check the Luma3DS version.

If your Luma3DS version is... Then...
10.2.1 and newer You can update to 11.17.0 without problems.
8.0 - 10.2 You must first update following the Restoring / Updating CFW guide. Otherwise an error screen will appear.
7.1 boot9strap must be updated first, or newer versions of Luma3DS will not work. Follow the guide at Updating B9S.
7.0.5 and older Your console must first be upgraded from arm9loaderhax to boot9strap. Follow the guide at A9LH to B9S.

Nothing happens or a different custom firmware is being used

Follow 3DS Hacks Guide, or ask for support at Nintendo Homebrew.

Section II - Format SD card

Use the Formatting an SD card guide.

Section III - Format System Memory

Go to System Settings -> Other Settings -> Format System Memory.

Section IV - Restore Luma3DS

Follow Restoring / Updating CFW to restore Luma3DS to the SD card.

Section V - Finalizing Setup

Follow 3dsguide:finalizing-setup to re-install stock homebrew applications and make new backups of important files.

Success icon Your console is now all cleaned up!