I think I found my winner, http://m.thewirecutter.com/reviews/the-best-external-desktop-hard-drive/
the 3TB backup plus desktop version. Supposedly this has the full 3.5'' drive with a barracuda drive in it. The Slim is a 2.5'' laptop hard drive.
I like the WD Black drives but they have failed on me before.
The difference between the 3TB and 5TB backup plus desktop is now $100 vs $140 depending where you get it. Apparently the 5TB was cheaperr in the past but right now most retailers have it at $140 so, the $33 to $28 difference per TB is not significant to me really.
I don't like the idea of having to turn it on and off all the time since it is for the xbox, but getting a more powerful drive instead of the 2.5'' laptop drive seems more appealing to me than the convenience.
Edit: apparently 3TB seagates are some of the most unreliable of all drives, so now i have to second guess again.
more data on drive reliability here:
the WD is hardly any better. the research never ends.Edited by 00firebird - 8/31/16 at 11:45am