Hello,
whenever I copy media files onto my 64GB usb stick they don't play any more
Hello. How are you? Ahmm I wanted to help in this topic. Try reformatting, if still do not work maybe it is really corrupted. You need a data recovery software. It ia to back up corrupt storage. I had it here to help you. http://www.techyv.com/questions/how-backup-corrupt-usb-mass-storage-data