That is what i was going to recommend as well, I have owned at least 5 of those things and they work great never had done fail on me.
Even if it is 2.5" notebook drive it still works in these things. I took the 1TB drive that came with my 2012 mac mini and tossed it in one of these that I was not using and it now works as the time machine backup drive.
Or you can go with this one, which has firewire as well.
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www.amazon.com/Macally-G ··· 6&sr=1-3