Sandisk Optimus GX C50 Xbox Series X|S Storage Expansion Card

The Sandisk 1TB Optimus GX C50 is a storage expansion card built for a single purpose: extending the internal library of an Xbox Series X or Series S. Because it is officially licensed, it drops into the console's dedicated expansion slot and behaves like built-in storage rather than an external accessory. That distinction matters. Titles optimized for the latest hardware demand the same low-latency performance the console provides internally, and Sandisk positions this card to match Xbox Velocity Architecture so games play directly from it.

Capacity is the practical headline. This 1TB model gives room to grow a collection, and Sandisk notes the platform supports up to 2TB and space for roughly 50 additional games. The NVMe foundation is what enables Quick Resume, the feature that lets you jump between several suspended games without losing progress or sitting through long loads. For anyone who juggles multiple titles at once, that responsiveness is the everyday payoff.

Ownership is refreshingly simple. There is no cable to route, no enclosure to power, and no manual formatting to think through. The card also arrives with a one-month trial of Xbox Game Pass Ultimate, opening access to hundreds of games across console, PC, and cloud. It is a focused product for a focused audience: Xbox owners who have filled their console and want more room without sacrificing speed.