If it just for files, you may actually go green or LP. I have not noticed any down side to swapping to green(Seagate LP 2TB 5900 rpm) drives for both files and backups.
Just dont try to use them for anything other then storage
I also have a WD Black 2TB , but it is far hotter(and louder) then its power saving companions so I do not dare use it in a enclosure without some kind of cooling or a 5.25 inch enclosure to get air room. It is very fast and makes a great internal drive for programs that you do not want on the SSD.
Seagate has new drive that is actually faster, but makes some of the most loud head parking EVER(when ever it is idle for a bit).