Making a NAND Backup

In case anything should go wrong in the later process and your Wii U ends up bricked, restoring a previously made NAND backup can fix it.

Instructions

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The Wii U MLC is (depending on your model) either 8GB or 32GB. As a result of this, to create a full backup of your console's NAND, your SD Card has to be larger than the size of your MLC. If you do not have a large enough SD Card, you can skip the optional MLC section which includes save files and game data and is not needed to recover any type of brick.

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Restoring a NAND Backup on the Wii U requires ISFShax or additional hardware and microsoldering skills.

However, making a NAND Backup is always useful, so please do not skip it.

Your NAND Backup is unique to your system. Backups from other consoles won't work without the required knowledge.

1. Navigate to nanddumper using the GamePad and press A to launch it.
2. Use the Wii U GamePad's D-Pad to enter the following configuration:
   • MLC is OPTIONAL, if you do not want to dump it, leave it on No. If you do want to dump it, make sure you have a SD Card big enough for it and put it on Yes.
3. Press the A button to start the dumping process.
4. When the process is completed, power off your Wii U, take your SD Card out of the Wii U and plug it into your PC.
5. To make sure you don't lose the files, copy the slc.bin, slccmpt.bin, seeprom.bin, otp.bin (and if you chose to go with a full backup, every mlc.bin.part file) to somewhere safe (Documents, Google Drive, OneDrive, etc.) on your computer.
   • They will appear on the root of the SD Card.
6. Delete the files you just copied from your SD Card to free up space.