I bought my R4 Revolution 5 days ago, i also got a sandisk 2gb micro sd card. The first day i had it, it worked fine, all games loaded without a hitch. I turned it off, went to bed, and the next day loaded it up. It now constantly freezes upon game loading, or, if i get into a game, it will freeze after a certain amount of time play, which is completely random. I've tried formatting, and using different versions of the revolution menu to no avail. If anyone has any ideas, it would be greatly appreciated.