Just a follow-up on this... I now have a 1TB Seagate drive. I thought I would be able to put it in the caddy that was included, but it's a 3.5" drive. It's also very heavy. I'm not at all sure what to do with this; it presumably contains all sorts of information like saved passwords, browsing history etc.
So, can I re-use it, and if so how?
And if not, how can I over-write it, or otherwise destroy it?
(My sister told me they attempted to destroy a HDD from a NAS with a hammer and found it pretty much impossible to do; these things are built like tanks!)