Why do you want a NAND backup of your Wii U when there's not really a reason to back it up at this moment in time?

 

k. :/

Wait, you have a bricked Wii U? o.O

 

Well you're not going to f**k up your Wii U anytime soon, but at the moment, no you can't dump without soldering, I'm afraid.

 

I want the benefits but I don't want to do the work.

 

And there's a massive reason. The Wii's security was just so poor, and Nintendo simply had to really nail down hard on their security for the Wi U, so nothing like that could happen again. It goes for all next-gen console projects; just learn from the mistakes you made the last generation.

 

you need a teensy , ace soldering skill, think soldering two points 0.5mm apart and your almost there skill wise, if you have managed a nand dump on ps3 using a teensy and done the 40 odd soldering points with perfect continuity then you can probably do this, then some decent dumping software (tip: theres something that works for this for the ps3 that will also work for wii u). What you actually do with the corrupted nand dump after to unbrick will also take a high programming skill level...Good luck!!

 

Do you recommend Teensy 2.0 for something like this, and also a PS3?

 

Teensy 2.0 and infectus, yup. For ps3 NAND consoles ended with CHECHC03 I think, cant remember, after this pretty much everyone got a NOR dumper like E3 flasher which had a handy dandy clip

 

I don't want to buy chips, this is why I going to use the SD card stuff. From 1 to 10, what level of soldering skill you need for the SD hack???

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I emailed smea earlier today, and he said he knows a software dumper, but it's not public

 

I'm 99% sure you need a dump of BOTH the NAND and the eMMC to have any hope of restoring a bricked Wii U. The SD hack job alone will give you part of a dump, but not enough to restore from a brick, as the NAND and eMMC are tied together.