i have set up some of theses cards for friends. 2 gig kingston SD. after playing for a while the cart gives the menu? screen. the SD card has nothing on it. the DSTT removes all content from the SD card leaving it blank. i have been around flash carts for a while and have been following best practice wit regards to the DSTT but this leaves me stumped. i reformat the card, reload files and all is well. i am just trying to avoid redoing the content of the SD card over and over again. this has happened on 2 cards that i know of. how much space should be left on the card after save files are created? do trimmed files create these problems? any advice?