Engadget spoke with Albert Penello, senior director of product planning at Microsoft, where he confirmed that the 500GB hard drives included with Xbox One console won't be replaceable, and are "non-user-serviceable."
On the bright side, you can totally use external storage devices with the Xbox One. Just plug in a external drive into the USB 3.0 slot and you can do anything the main hard drive can do, from game installs to downloads.
Microsoft details Xbox One April update, includes dedicated servers for party chat
10:30 AM on 03.27.2015