Once the backup finishes, power off your Wii, remove the SD card, and insert it into your computer. You will find two files in the root directory: nand.bin and keys.bin . Copy these files immediately to a safe location on your hard drive, and consider backing them up to an external drive or cloud storage.
The first icon in this new menu shows a green arrow pointing from the Wii chip to an SD card. This is the utility. Press the Reset button once to select it. 4. Wait for the Dump to Complete Wii Nand Backup Files Download