So I had to wipe my microsd card. Deleted all partitions, formatted it as fat32 again, put it back in the N3DSXL. Now all I get is "Can't display software on... Can't access microSD card" notifications. The 3DS itself works, I can update it, I can enter the settings and everything, but it just doesn't read the card anymore. I can still access the card just fine on my PC with a card reader though. What can I do here? Well I won't say "nvm fixed it", in case anyone ever stumbles upon this thread: You want the official SD Formatter 4 program, google it, easy to find. Only that one will help you now.