Hi, I recently watched this video which details how to fix a WiiU with a bad eMMC: https://youtu.be/XgN_S1PgbGU?si=2CRYth-a7WIrC1XF and the video is very informative and helpful with walking through the process!
However, my issue comes from a lack of tech savviness (if thats even a word). So I just have a few questions,
- My WiiU has a lot of save data I wouldn't want to lose, so how do I back up save data? (I'm sorry if that's a stupid question). Would I just save it to the SD card and it'd be as simple as that?
- The video, he uses a raspberry pi for part of this process, if I use just a simple USB, would that do the job, or does it NEED to be a raspberry pi? I just am not that big on modding, mainly from a lack of knowing how, and don't want to buy many things unless I absolutely have to.

I think those are my only questions at the moment, but if I have more, I'll obviously ask. I'm just not that smart with technology so again, I'm sorry if this is also simple things, I just don't understand 😭.
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If your Wii U has error code 160 0103 then you would have to use a Raspberry Pi with the Recovery Menu at the very least to do any kind of Data backup. More so, the Wii U would have to be repaired and the data will have some kind of corruption and that corruption would also have to be fixed before you could restore the data to the console.

Would it just more so be worth it to just buy a new wiiu atp, and try transferring my data that way?

From everything I've looked at, repairing the wiiu's internal piece looked a little complicated with all the soldering, and trying to save the save data along with the console seems very unintuitive

I've also seen that you can potentially change the wiiu to read the broken device as an external storage device, by doing some stuff with an SD card. Not sure if that could potentially fix the error without soldering. But on top of that, I've looked around and seen either 2014 and older models don't have the piece that's prone to breakage over time, or the white model in general tends to be the most reliable of any wiiu

Does your Wii U currently work?

Yes, however some games don't, Smash 4 and a Lego Marvel game. But I can't open any NNID settings from the user profile either because of this error. So, functional for most things at least.

The easiest way to transfer save data would be if the console is functioning and you can use the built in method to transfer it to another Wii U. It sounds like you would prefer to buy a working unit than to fix one you have, which is fine.

That being said if your console has issues with that transfer than you would have to extract the data using recovery tools (Raspberry Pi Pico + ISFShax), repair the Wii U and then repair the corruption from the backup and restore it on the console. You cannot just make a copy of one Wii U and move it to another, that won't work because they all have individual built in encryption keys.