Here's the deal: the Xbox Series X comes with a listed storage capacity of 1 TB, but that number drops to 802GB once you factor in system software. The Xbox Series S internal storage, on the other hand, has 512GB, but after taking into account system software it drops to 364GB.

The $499 Xbox Series X comes with a 1TB internal NVMe solid-state drive, which has around 800GB of usable space once system files have been accounted for. The $299 Series S has the same nippy drive, except it's half the size, with only around 360GB of available space once you've plugged it in.