I really don't want to install an internal one - there's literally no room inside my case. Well, almost literally.
Anyway I've had a little look around but found mostly mixed reviews on every model, so I was hoping someone here can recommend one.
Preferably over 200GB in size and definitely less than ~£100.
I'm terrible at finding good (read: affordable and reliable) electronic goods online - scan and amazon are about as far as I get.