Required Reading

This section will create a backup of your device’s internal NAND memory on your SD card, which will allow you to restore your device via a hardmod in the case of a brick.


A backup of the MLC partition is optional as it’s huge in size, and most bricks that need MLC to be restored are done by user-error.

If you want a full backup including MLC, and 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.

1.While in the Homebrew Launcher, launch nanddumper

  • If you left the Homebrew Launcher, return to it by running the Wii U browser and go to

2.Use the D-Pad to set the following options:

  • Dump SLC (528MB): yes
  • Dump SLCCMPT (528MB): yes
  • Dump MLC (8GB/32GB): optional
  • Dump OTP (1KB): yes
  • Dump SEEPROM (1KB): yes

3.Press (A) to dump your NAND

  • Be prepared to wait; this can take a while (up to several hours depending on the options you enabled)

4.When it has completed, your Wii U will reboot automatically
5.Power off your device
6.Insert your SD card into your computer
7.Copy slc.bin, slccmpt.bin, otp.bin, and seeprom.bin, and each mlc.bin.part file (if you chose to backup the MLC partition) from the root of your SD card to a safe location on your computer

  • Make backups in multiple locations (such as online file storage)
  • These backups will save you from a brick and/or help you recover files from the NAND image if anything goes wrong in the future

8.Reinsert your SD card into your device
9.Power on your device


Mocha CFW

This method requires that you rerun the web exploit used above after every reboot.
Continue to Mocha CFW


This method uses a cheap exploitable DS Virtual Console game to launch your Custom Firmware automatically at boot.
Continue to Haxchi

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  1. I inserted a 32gb sd card into my 32gb wii u. Will this brick my wii u?

  2. I read that the Wii & Wii U only accepts SDHC. I own a 32 gb model but there is no sdhc larger than 32GB, that would be SDXC which the Wii U can't write or read too (or at least that's what I've heard, I'm not totally positive), Can I use SDXC for this process since it's Homebrew? I know Homebrew related apps can bypass certain wii settings making it possible to do specific things the regular wii u cannot. Any help would be greatly appreciated.