I used the same SD card to install homebrew that I'd been saving my data on, for lack of another card, and homebrew works fine. However, some of the game data on the card, for example my Beatles: RB data doesn't register anymore. It simply comes up on the SD card menu (under memory) as a block with a large ? on the front. On the other hand, about four of my games still come up fine. What did I do wrong? Is there any way to restore the ? data?