A lot of Xbox owners prefer to up their storage with WD My Book.
Your choice in capacity is 2TB/3TB/4TB or 6TB and it is pretty reliable storage solution for your Xbox.
It comes with USB 3.0 with maximum speed of 5 Gb/s and USB 2.0 with 480 Mb/s (Max).
I think it meets your criteria, you can see more features of My Book here: http://www.wdc.com/en/products/products.aspx?id=870#Tab3
A lot of Xbox owners prefer to up their storage with WD My Book.
Your choice in capacity is 2TB/3TB/4TB or 6TB and it is pretty reliable storage solution for your Xbox.
It comes with USB 3.0 with maximum speed of 5 Gb/s and USB 2.0 with 480 Mb/s (Max).
I think it meets your criteria, you can see more features of My Book here: http://www.wdc.com/en/products/products.aspx?id=870#Tab3