I'm with a big problem. I have a Xbox 360 (old model) with a 20G HDD, and have decided to buy a 120GB HDD, so I simply bought one and normally tried to put it on my xbox. The problem is that my xbox can't read it, it says that the HDD is "Unformatted", and when I try to format it nothing happens. At first I thought that the problem was with my HDD, but after seeing that it was perfectly working on other xbox, I realised that the problem is my console. The strangest part is that my 20GB HDD never gave me any problem, and it's still working.
So, what can I do to fix this issue?
PS: Before anyone ask, both hard drives are Microsoft official.