How to move Games, Saves, Themes, and Emunand to a new SD card
- Get Emunand Tool (latest version, or version 1.0.1 if you get an error in step 12)
- Insert your old SD card in your PC
- Open Emunand Tool and select "Extract EmuNAND"
- Save it somewhere on your PC (as [EmuNAND firmware version] emunand.bin if you want)
- Backup all your SD card files to your PC
- Eject your old SD card
- Put EmuNAND9's launcher.dat on your new SD card
- Launch EmuNAND9 using the web browser in Sysnand (URL: go.gateway-3ds.com)
- Once in EmuNAND9, navigate to Complete EmuNAND Setup. Ignore the starter.bin warning and follow the instructions. Wait for the EmuNAND creation process to finish.
- Turn off your 3DS
- Insert your new SD card in your PC
- Open Emunand Tool and select "Inject NAND to emuNAND"
- Select the emunand.bin you made in step 4 and press OK
- Close Emunand Tool when done - you will know it is done when the buttons are clickable again
- Delete all the files on your new SD card
- Put the SD card files from your backup (from step 5) on your new SD card
- Done, emunand and data (saves, games, etc.) have been transferred to your new SD card!
Scroll down the first post:
https://gbatemp.net/threads/tutorial-installing-rxtools-custom-firmware-3ds-and-2ds.390867/