Ok, I decided I would make YSMenu my cards main firmware. I played a game, but felt like playing another. I started up a game, tried to create a save file. It said "Save cannot be made" then when I tried to load the game it said "Unable to find game." Restarted my DS "DS_Menu.dat could not be found." I am using the USB Reader that came packaged with the R4, but I have never had this problem before YSMenu, so I don't know if it YSMenu, the card reader, or my card.