I have an A-Data Micro SDHC 4G in an M3DS Real. It has worked for about a month and all the sudden last night my computer cannot find it. I tried using the USB reader and the SD card converter, neither one worked. So, I cannot get to the contents of my card to alter it. The weird thing is...the card works fine in the DS. No problems at all in the M3DS Real, save games, etc. So what could the problem be and how can I fix it?