Well every time I'd insert my DSTT into my DS it would give me this logo saying "ERROR" in red. When I connected my micro SD to the computer with the reader that came with the DSTT, it said it had to be formatted. So i format it to FAT32 and now whenever I click on the drive to drag the files, it says "Please insert disk into drive". Also I can't format it again. I've tried many programs, still no success. I was thinking its because of the card, since its a cheap manufacture(KINGMAX). It was only $8.95 at a local computer store. Any got a solution, tell me please. Thanks