I bought a used 3ds xl that boots up and has a working menu, however when I try to insert and use a Nintendo DS cartridge I get an error code stating that the system cannot mount or load a CTRNAND FIRM. This is my first time encountering an error like this and I have no experience hacking a 3ds...
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day