I have a 16gb card for my M3i Zero which is a heck of lot of memory for a DS flashcart and would love to use it as a general purpose usb device and 3DS storage for bigger games when i need it. But the M3i Zero seems to be very sensitive and once i move around the files on the SD card and add big media files post update and installation it very easily forces me to reformat the SD card and start all over again. I hate this i want to be able to use this 16Gb sd card to its full potential! I really don't understand why this happens. Can anyone explain to me the background of this dilemma is there a work around?