Ok, so I heard of people having issues with the data on class2 SD cards being wiped...I actually had it happen to me but was able to fix it WITHOUT reformatting and/or losing data. The phone saw nothing on the SD card, my WIN7 64bit PC didn't either. I simply right clicked the corresponding drive in MY COMPUTER, clicked PROPERTIES, and the clicked the TOOLS TAB. In tools I clicked ERROR CHECKING and selected both CHECK DISK options. The process ran successfully, when it finished I popped the SD card back in the phone and BAM there it was! Fully recognizable and data intact! The next step is optional: remove the SD card and put it back in your computer and do a DISK DEFRAGMNENT on it, when complete put it back in the phone. After this you should notice faster loading and media scanning of the the card and its contents. I hope this helps!