OK, so I got my shiny new TB and was ready to make use if all that storage and out some music on my SD card. I wired my TB, selected "mount as hard drive" in the USB menu, and copied ONE music folder to my SD card as a test. Unmounted and tried to play said music... Music played, but ever since then I have an icon in my status bar that reads "Mounted ReadOnly" and now my Gallery won't work and none of my file managers recognize my SD card. Nothing I try fixes this. Any suggestions???