You may already have this from a earlier section in the guide.
Place FBI.3dsx into the 3ds folder on the sd card.
Create a folder named cias on the root of the sd card.
Place FBI.cia, Universal-Updater.cia, Anemone3DS.cia, ftpd.cia, hblauncher_loader.cia and Checkpoint.cia in the cias folder.
Create a folder named payloads in the luma folder on your sd card.
Copy godmode9.firm from the godmode9 zip file to the luma/payloads folder.
Copy the gm9 folder from the godmode9 zip file to the root of your sd card.
Section II - CFW Check
Power off your console
Hold the (Select) button
Power on your console while still holding the (Select) button
If the check was successful, your console should have booted into the Luma3DS configuration menu
Press (Start) to save and reboot
Power off your console
If you do NOT boot into the Luma3DS configuration menu, custom firmware was not installed on your console. Join Nintendo Homebrew on Discord and ask, in English, for help
Section III - Updating the System
Update your console by going to System Settings, then “Other Settings”, then going all the way to the right and using “System Update”
Updates while using B9S + Luma (what you have) are safe
The updater may display a message saying “Your system is up to date” instead of updating. This is normal if you are already up to date; continue to the next section
If this gives you an error, set both your DNS settings and Proxy settings to “Auto”
Press (Left Shoulder) + (D-Pad Down) + (Select) at the same time to open the Rosalina menu
If one of these buttons is broken, download this config.ini and put it in your luma folder, replacing the existing one. This will change the Rosalina menu key combination to (X) + (Y)
Select “Miscellaneous options”
Select “Dump DSP firmware”
Press (B) to continue
Select “Nullify user time offset”
Press (B) to continue
Press (B) to return to the Rosalina main menu
Press (B) to exit the Rosalina menu
Section V - CIA Installation
Open the Activity Log Application
Press (Left Shoulder) + (D-Pad Down) + (Select) at the same time to open the Rosalina menu
Select “Miscellaneous options”
Select “Switch the .hb title to the current app”
Press (B) to continue
Press (B) to return to the rosalina main menu
Press (B) to exit the rosalina menu
Close Activity Log
Reopen Activity Log
This should open the homebrew launcher
Select FBI from the list of homebrew
Click SD, then click cias.
Click a CIA file, then click install and delete all CIAS.
Close FBI
6 new applications should be on the home menu.
Section VI - NAND Backup
Power off your console
Press and hold (Start), and while holding (Start), power on your console. This will launch GodMode9
If you do not boot into GodMode9, ensure that you copied godmode9.firm to the luma/payloads folder of your SD card and that the folders are not misnamed (e.g. playloads.)
If you are prompted to create an essential files backup, press (A) to do so, then press (A) to continue once it has completed.
If you are prompted to fix the RTC date&time, press (A) to do so, then set the date and time, then press (A) to continue.
Press (Home) to bring up the action menu
Select “Scripts…”
Select “NANDManager”
Press X to select “Backup SysNAND”
Press A
The NAND backup process may take up to 20 minutes.
Press the A button
Press Dpad Up to exit NANDManager
Insert your SD card into your computer
Copy the /gm9/backups/ folder to a safe location on your computer
This folder contains critical file backups and should be backed up to multiple locations (i.e. cloud storage) if possible
The two SysNAND files are your NAND backup and can be used to revert your console to a working state if it is bricked by a software issue
The essential.exefs file contains your console’s system-unique files and can be used to recover your data in the event of a hardware failure
If you still have them, delete the two SysNAND files from the /gm9/backups/ folder from your SD card
The essential.exefs file is small and may be kept on your SD card for ease of access
Section VII: CtrNAND Luma3ds and GM9
Insert your SD card into your console.
Press Home to bring up the action menu
Select “Scripts…”
Select “GM9Megascript”
Select “Scripts from Plailect’s Guide”
Select “Setup Luma3DS to CTRNAND”
When prompted, press A to proceed
Press A to unlock SysNAND (lvl1) writing, then input the key combo given
Press A to continue
Exit the GM9Megascript by pressing B
Select 0: SDCARD <Volume Label>
the volume label is specific to the sd card.
Select the luma folder
Select the payloads folder
While hovering over godmode9.firm, press the Y button.
Press the B button three times
Select 1: SYSNAND CTRNAND
Select the rw folder
Select the luma folder
Select Y and R to create a folder
Name the folder “Payloads”, then enter it
Press Y
Select “Copy Paths”
Press A to unlock SysNAND (lvl1) writing, then input the key combo given
Power off your console
You’re done! Custom firmware is now fully configured on your console.
Information and Notes
Here are some key combos that you should know:
Holding Select on boot will launch the Luma3DS configuration menu.
Holding Start on boot will launch GodMode9, or if you have multiple payloads in /luma/payloads/, the Luma3DS chainloader.
By default, pressing L + ↓ + Select while in 3DS mode will open the Rosalina menu, where you can check system information, take screenshots, enable cheats, and more. This can be changed from the Rosalina menu.
If you have a modified Luma config, this key combination may be X + Y instead.
Holding Start + Select + X on boot will make the notification LED show a color for debug purposes. See here for what each color means.
See here for some suggestions on things to do with custom firmware.
