If you’ve had your Xbox One for a while, the chances are it’s running low on storage space. Most Xbox One models come with 500GB or 1TB drives, which isn’t much to work with. Thankfully, you can add some additional space using an Xbox One external hard drive. In this article we detail everything you need to know about Xbox One external hard drives. You Can’t Replace the Internal Xbox One Drive It’s important to note that external hard drives are the only officially supported solution for gaining more Xbox One storage.