HI people, Basically, the other day I put some songs onto my USB stick from my mac. I then transferred them over to my PC and once on my PC, I deleted everything off of the USB and that was that. Now when I put my USB in my Mac, everything shows up as it should, but i cannot copy anything to the USB at all. I've tried Erasing, Verify/Repair, Re-formating to no-avail. This what happens whenever i try to copy something to USB: What should I Do?!