I use QuickPic instead of Gallery and suddenly it's saying it finds no photos on my SD card and asks if the card is mounted correctly. I rebooted, fiddled with the SD card, and thought I'd have to reformat it - but that doesn't seem to be the problem, because all the photos are there when I go to MyFiles. My music player (N7player) has also stopped finding music files, although they're there, too, and if I click on a specific file, I have the option of using N7. When I do, it plays, but doesn't recognize any of the info it used to have about the artist and so on. What do I need to do to make these apps find files on the SD card again?