I FAT formatted (not for the first time) my SD card to play a patched version of Spirit Tracks. Previously, whenever I tried to load the game (patched or unpatched) I got this error message: [Rom loading failed] disk errcode=-81 Please reset system. So like I said, I FAT formatted it, using my mac, which I have done with great success many times before when having similar problems. HOWEVER, now a ton of games that used to work fine are no longer working, giving me the same error message that Spirit Tracks (which now works fine) gave me before the format. I'd like to get these games working again. I'm using YSMenu on what I believe is an original R4. What should I do?