I've just upgraded my old 320GB HDD with a 1TB HDD for my unibody MBP.
Now can I just use my 320GB HDD and get a firewire enclosure to make an additionnal HDD backup?
I use one of these NewerTech Voyager These can hold 2.5 and 3.5" drives, include all the cables. Get one of these as a backup and you can use it for many different drives instead of a case for all externals - that lets it pay for itself