I bought a new official Xbox 360 accessory transfer cable from gamestop and my new slim does not recognize the old hard drive. Even if I go under System Settings, memory I do not see any other drives.
I thought maybe the cable was defective, so I returned it and the same thing with the new one. It says on the packaging works with ALL xbox hard drives, except mine. :(
I've seen other reports online of the same problem, did microsoft just release a crappy cable?