Exclusively for Prime members, Western Digital’s WD_Black C50 1TB Storage Expansion Card for Xbox is on sale at Amazon for $120.64 (about $37 off), very nearly its lowest price to date. You can also get WD’s 512GB card for $65.54 (about $14 off), a few dollars shy of its lowest mark.

Given the price hike for the premium offering — Xbox Game Pass Ultimate — just went up in September to $19.99/month, you can bag a decent saving by buying a 3-month membership during the Prime Day October deals. Why's Game Pass Ultimate so important? It's the only plan that includes day-one access to new first-party Xbox titles.

Discounts on this powerful Microsoft console can be pretty hard to come by, so there's a good chance that this deal will sell out before it officially expires at 12:59 a.m. ET (9:59 p.m. PT) tonight.