Seagate has announced the new Game Drive for Xbox SSD, an external flash storage drive for the Xbox One and Xbox One S for storing all your games.
Unlike the PS4, the Xbox One does not come with a user replaceable internal drive, which means you are stuck with whatever you get your Xbox with at purchase. With this drive you will be able to expand the storage on your Xbox for games and other files.
Also, unlike the internal hard drive on the Xbox One, this drive uses flash storage, which should result in faster load times within games.
The Game Drive for Xbox SSD has 512GB of storage space and is priced at $199.99. You can still get the mechanical drive version of this if you want more space (up to 4TB).
Purchase a Samsung SSD 500GB 850 EVO from ebay on the cheap to use with my xbox. Worth it, games load so much faster! Battlefield 1 with it's big maps would take a good minute or two to load, now I'm the first one in the map!
I think you can use any USB 3.0 drive and that should work fine. This is complete waste of money.
He probably forgot to read that it's a SSD not HDD.