I have a 3TB external western digital passport I use to store video files on. All of a sudden when I try to add new media by plugging it into my PC, the Xbox won't read the new files, I have formatted the drive with my PC and moved everything over again to the external drive, then my Xbox detects and works perfectly with the new media, however, if I unplug the external drive from the Xbox and plug it back into my PC to add more media files, after plugging it back into the Xbox the new media is not there again, only the original media is playable. Is my drive going bad ?