Seagate Storage Devices

STJR1000400 Overview

The Seagate Storage Expansion Card STJR1000400 is a PCIe 4.0-based internal expansion SSD designed specifically to expand storage on Xbox Series X and Xbox Series S consoles. It fits into the dedicated storage expansion slot on these consoles and works seamlessly with the Xbox Velocity Architecture, meaning games and apps stored on this card run just as fast as those on the console’s built-in SSD. With 1 TB of additional high-speed storage, it lets you install and play more games — including AAA titles that require large amounts of space — without sacrificing performance, load times, or responsiveness. Installation is simple plug-and-play with no complicated setup required, and its compact card form factor keeps everything neat and integrated.