I was a little worried about this purchase as no one seemed to know any specifics about it really, only rumors. Hopefully if you were or are interested in it this will answer most of your questions. It turns out to be an excellent addition to an Xbox One. Gets a 9 out of 10 from me. You can find them at the links below or just do a google search yourself. Update 10/19/17 Been using this drive for nearly 3 weeks now and I see no degradation in loading or access times. Now highly recommended, 10 out of 10.
Walmart – https://www.walmart.com/ip/Seagate-8TB-Game-Drive-Hub-for-Xbox-External-Hard-Drive-STGG8000400/606955480
Seagate Specs – http://www.seagate.com/consumer/backup/backup-plus-desk/#product_comparison