I wonder if anyone can help. I've got a lot of training videos on my 2 hd's and thought I'd better back them up in case I ever have to reformat them due to os problems. Does anyone know the best way to do this and which would be the best external hd to use. I've heard the term firewire external hd - is this type better? I guess as both my hd's equal about 100gb so 120gb external would be best?