I have a 320GB model and it's nearly full. I think could safely install say a 1TB model as there's lots of helpful stuff on the net about how to do that. However, what I want to do is copy the contents of (clone?) the original HDD to the new HDD. My partner wouldn't be able to handle trying to view old recordings from a separate HDD in a caddy. How easy would it be to do what I've described? I would describe myself as having basic IT skills. I've seen posts on this elsewhere but nothing very recent, and I found a lot less than I might have expected generally.