I just got a 3tb drive and put it into this machine. But its only showing up as 746.39gb. The machine is running windows 7 pro, but it was upgraded from xp. I do not need it to be a bootable or system drive. I just need it more or less for storage as there will be a lot of video files recorded and saved on the drive. Is there a way to make the system read the whole drive without reinstalling the operating system. Or id be fine with splitting the drive into a 2 tb and 1 tb or three 1tb drives if that's easier to do. But once again without reinstalling the operating system. Or is it easier to take it back and just get a 2tb or few 1tb drives?