What I meant was you posted an error pic. Where and when did that happen. I wasn’t sure if that’s error you got when tried to access sd card in vwii sd management or if it was error when tried ur 3ds sd card? Vwii sd management is a system thing not hombrew.
I edited the above in after I write below.
It’s hard to tell what ur talking bout cause other peep are asking questions in between so it’s tough to tell what ur answering.
Ok so when ur on vwii and u goto sd card management at bottom left of screen you get an error and can’t even get to see whats on sd card.
So it’s def got nothing to do how you have hb launcher setup, we can cross that off
Next find app to test if sd card is a fake. I know you tried several but maybe they all are if bought online
You might have a problem with the Wii U sd reader. If Sd card is definitely good
Maybe shine a flashlight and take a look inside Wii U sd slot. Might be dirty and have lint or dust build up. I’ve had my phone case not beable to charge because of dust and had to run thin plastic card between contact to clean it. Then it worked
If u leave the door to it open with no card in then crap can get in there. Especially if smoke or vape. Which makes sticky film then dust sticks to it more