This is my first desktop since I've always been using a laptop and now I would like to upgrade my hard drive from 1TB to 3TB so do I just unplug my 1TB and replace it a 3TB hard drive? Also is it possible to transfer all my files from my 1TB hard drive to the 3TB hard drive from another computer before place it on my computer? For example I take my 1TB hard drive to a computer store and there we format the 3TB hard drive, transfer the files from the 1TB and then go home, plug it into my computer.