NAND Backup


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These steps will create a backup of your NAND on your SD card, which will allow you to restore your device using a hardmod in the case of a brick.

If you have a black Wii U (32GB) model, your SD card must be at least 64GB in size. If you have a white (8GB) Wii U model, your SD card must be at least 16GB in size.

Before starting, you may want to check your SD card for errors using H2testw (Windows), F3 (Linux), or F3X (Mac)!

What you need

Instructions

  1. Power off your device
  2. Insert your SD card into your computer
  3. Copy and merge the contents of the Wii U NAND Dumper .zip to the root of your SD card
  4. Reinsert your SD card into your device
  5. Power on your device
  6. Launch the Homebrew Launcher Channel on patched SysNAND
  7. Launch nanddumper
  8. Use the D-Pad to set the following options:
    • Dump SLC (528MB): yes
    • Dump SLCCMPT (528MB): yes
    • Dump MLC (8GB/32GB): yes
    • Dump OTP (1KB): yes
    • Dump SEEPROM (1KB): yes
  9. Press (A) to dump your NAND
    • Be prepared to wait; this can take a while (up to several hours depending on how much used space you have on the internal memory)
  10. When it has completed, your Wii U will reboot automatically
  11. Power off your device
  12. Insert your SD card into your computer
  13. Copy slc.bin, slccmpt.bin, otp.bin, seeprom.bin, and each mlc.bin.part file from the root of your SD card to a safe location on your computer

If you ever brick your device, you will be able to use this backup to restore it using a hardmod.