Ensure your battery is charged above 50% before attempting an install. To help you get the right files for your specific setup:
Place your nand.bin file into the /gm9/out/ folder on your SD card. Boot into GodMode9 (Hold Start during power on). Navigate to [0:] SDCARD -> gm9 -> out. Select your nand.bin file and press A. 3ds nand download install
If your system becomes unstable or "bricked," you can restore your previous NAND dump. Warning: This process can be dangerous if interrupted. Ensure your console is plugged into a charger. Ensure your battery is charged above 50% before
In the world of 3DS modding, "downloading" your NAND actually refers to "dumping" it—copying the internal memory onto your SD card. This is a critical safety step before performing any system modifications. 3ds nand download install