First of all I have two Micro SD cards both are SanDisk one is 2gb and the other is 8. I flashed my 2gb one and it works fine but i accidentally started up my DSi with my other micro and it didnt work so I quickly remembered to Flash is but my Computer says I need to format it and tryed but it says i cant. So did i screw my self over when i put it in my DSi or is there a way to format it?