Recommend me a HDD or SSD, please. I've feck all room left.
You using the 500GB one?
This is the one I got for Christmas (only just installed it as I'm lazy): http://www.amazon.co.uk/Seagate-STB...2.5-Inch+USB+3.0+Portable+External+Hard+Drive
And follow the instructions in either of these two albums:
http://imgur.com/a/JF5jA
http://imgur.com/a/9giKA - this one is for after the latest update where you can make backups to USB, which is what I did.