Can Xbox Series X and S Use the Same Expansion Card?

This article confirms that the Xbox Series X and Xbox Series S share identical storage expansion capabilities using the same proprietary card. Readers will learn about the compatibility of Seagate and WD expansion cards, the performance benefits over external USB drives, and the simple installation process required to boost console storage without sacrificing speed.

When Microsoft launched the next generation of consoles, they introduced a custom NVMe SSD architecture designed to eliminate load times and enable features like Quick Resume. A common question among owners is whether the storage expansion solutions are interchangeable between the high-end Xbox Series X and the digital-only Xbox Series S. The answer is a definitive yes. Both consoles utilize the exact same proprietary Storage Expansion Card slot, meaning a single card model works seamlessly across both devices.

The proprietary expansion cards, primarily manufactured by Seagate and Western Digital, are designed to match the speed and architecture of the internal SSD. Because the Xbox Series X and Series S share the same underlying storage interface for this specific slot, you do not need to buy a different card for each console. A 1TB Seagate Storage Expansion Card purchased for a Series S will function identically if plugged into a Series X, and vice versa. This compatibility simplifies the upgrade process for households that own multiple units of different models.

Installation is designed to be plug-and-play. The slot is located on the back of both consoles, next to the HDMI and power inputs. Once the card is inserted, the system recognizes it immediately, requiring only a quick format process before it is ready to use. There is no need for complex setup or external power sources, as the card draws power directly from the console. This ease of use ensures that expanding storage is accessible to all users regardless of technical expertise.

It is important to distinguish the proprietary card from standard external USB hard drives. While you can connect USB storage to both the Series X and Series S, those drives cannot store or play optimized Xbox Series X|S games. USB drives are suitable for storing backward-compatible Xbox One, Xbox 360, and original Xbox titles, or for cold storage of Series X|S games that must be transferred back to the internal SSD or expansion card to play. Only the proprietary expansion card allows you to store and play next-generation titles directly without compromising performance.

In summary, expanding storage on the Xbox Series X and Xbox Series S is a unified process using the same hardware. Owners of either console can purchase the same Seagate or WD Expansion Card with the confidence that it will deliver full speed and compatibility. This shared ecosystem ensures that upgrading storage remains a straightforward and consistent experience across the entire Xbox Series family.