Are you trying to (unbricking) or set up Dolphin emulator ?
For most users, BootMii is the recommended tool. It is the most low-level backup possible and should be considered the "gold standard" for NAND archiving. wii nand archive
Make sure the backup finishes without errors. It will create two files on your SD card: nand.bin and keys.bin . How to Archive and Use Your NAND Backup Are you trying to (unbricking) or set up Dolphin emulator
Wii NAND archive report serves as a vital safeguard for any modded console, acting as a complete "system image" that can recover a device from a total brick. 1. Executive Summary: What is the NAND? The Wii's NAND is its 512MB internal flash memory Make sure the backup finishes without errors
Operating a physical Wii or utilizing Wii software in the modern era comes with distinct risks. Archiving your NAND mitigates these issues completely. Prevention Against "Bit Rot" and Hardware Failure
Unique cryptographic keys specific to your Wii. Why You Need a Wii NAND Archive (Preservation)