Pre-order the Xbox Series X and S expansion card
If you want to play a significant number of games on your X-Series, you’ll probably need extra storage space at some point. The Xbox Series X comes with 1TB of built-in storage, while the Series S comes with 512GB. And as the size of game files is constantly increasing, these devices are sure to fill up soon.
You can use a standard USB device to hold your games (just like you can on the Xbox One), but that makes a few drawbacks to the Series X and S. The big one is that you won’t be able to play games optimized for the Series X and S from a standard USB device; to do this, you will need to transfer them to the on-board storage or to the official expansion card.
You can play Xbox, Xbox 360, and Xbox One games directly from a standard Series X and S USB drive. But if you load these games into the on-board storage or expansion card, you’ll get a faster time to load older games. You can also store games optimized for Series X and S on a standard USB device, but you’ll need to transfer them to the on-board storage or expansion card to play them.
Yes, it’s a bit confusing, but you can find more information about the Xbox Series X and S storage here.
Chris Reed is IGN’s shopping and marketing editor. You can follow him on Twitter @_chrislreed.