Hey Guys, So, I have an external WD MyBook 2TB hard drive that I keep all my music on. A friend of mine has the same exact 2TB hard drive. At one point, we copied all the files from mine on to his, which was blank at the time. So, obviously at that time we had identical hard drives. I, in the meantime have gone on collecting files, and I'd like to transfer to them to his hard drive. The only method I know of would be to wipe his clean, and then copy everything over again, taking another 12 hours to do it. Does anyone have a better solution?