The Xbox One is equipped with a 500 GB or 1 TB internal hard drive depending on which console you purchased. Most of this space is available for storing games and apps, though some is reserved for saved games, console software, and other important system functions.
A triple-A game on Xbox One can use around 20 GB and 40 GB of storage space on a drive. Installing a lot of games can quickly use up the internal drive space of your Xbox One.
If you connected and setup an external storage drive to your Xbox One, you will be able to copy or move games and apps between the Xbox One’s internal drive and connected external drive(s).
This tutorial will show you how to manage external storage to move or copy games and apps between storage devices on Xbox One.