i've had this problem before. It appears as though content (mostly pictures, probably some music too but i have too much to tell what may be missing) on my SD card is randomly deleting?? Could it be from plugging my phone into my computer and unplugging it without doing some proper way of unmounting? I notice when i plug it into one of my computers i notice it stops charging and 'mounts sd card' alot, even though it remains plugged in. Or could content somehow have moved to internal storage?? if so how can I check my internal store? (what folder would it be, where would it be, etc) any tips/suggestions/thoughts?