This is really annoying. I got two DSTT's, one for me, one for my boyfriend's nephew. He has a 2GB Samsung microSD, works fine. I have a 4GB Samsung microSD, and I get an error message that says "cannot find TTMENU.SYS, reset system" everytime I try to load a game. TTMENU.SYS is there, in the root of the card. I formatted the card twice (tried both FAT, FAT32 and FAT32/64MB allocation), Tried firmwares 1.07/1.08 preview, 1.07, and 1.06, still get the same message. The microSD works fine on an M3 Real and a CycloDS. Any ideas as to what it could be? I'm about to break out my 1GB microSD and see if its the SD or the card. Any other suggestions?