Pros: The Hitachi 4TB Drive is what I was looking to put Inside of My Custom Built Computer, because I'm running out of Storage space. The Specs of this Drive are Really Great.

Cons: I have been trying to get this Hitachi 4TB Internal Drive to Initialize and then Format so I can Use it. I was able to get it to Initialize, but Not Format, because when I select it, My Computer Locks Up and I can NOT do ANYTHING at all. When I disconnect the power to the Drive, then My computer works just fine. If I connect the power and Boot Up My computer, then it just hangs in the Boot process and does NOT finish the Boot Process. I'm about ready to call Hitachi and get Tech Support on the phone to see about either Helping Me to get the Drive to show up, or have Tech Support switch Me over to the RMA Department.