I've been using a 16gb micro sd with my DSTwo since I bought it and for the most part it has worked. I wanted to put some new files onto the micro sd so I put it into the adaptor it came with and tried to copy them on, only to find that my micro sd was now write protected. I can't delete or put new files on and my sav files aren't even keeping, so basically it has become unusable. Anyone know how to fix this? I've tried the trick of sticking the micro sd into a sd card adaptor and switching the lock slide to unlock but it hasn't worked.