The Xbox Series X and Series S come with up to 1TB total storage, some of which is already taken up by the console's operating system. AAA titles can fill that space up fast, and the Xbox Series consoles don't have standard M.2 SSD expansion slots like the PS5. It does support external SSDs via USB, but for full-speed storage that will actually play games optimized for the Xbox Series X/S, you need one of a few approved cards that fit a specific slot on the back of the console. The Seagate Storage Expansion Card was the first of those, and is IGN’s pick for best Xbox Series X/S SSD.

That approach means Xbox storage expansion isn't often as cheap, but there's at least one nice trade-off in its ease of use. Plugging a card into the back of your console is way easier than opening it up and connecting things to the internal board – and a lot less anxiety-inducing for those who don't do that sort of thing all the time.

The Seagate Storage Expansion Card is available in three different capacities: 4TB, 2TB, and 1TB. The $379.99 4TB card is the best per-terabyte deal, but 2TB is the sweet spot, providing ample space for a healthy gaming library without costing almost as much as a new Series S.

Other Xbox Deals Worth Shopping

After you grab the Seagate Storage Expansion Card, head to our roundup of Xbox game and accessory deals. We've also highlighted a number of other gaming deals, with specific breakouts for the Sony PS5 and Nintendo Switch and Switch 2, if you're of the multiplatform pursuasion.