WD_BLACK C50 expansion card for Xbox Series X|S
Nintendo Switch 2 and Xbox storage, ranked by value on Amazon.co.uk
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The WD_BLACK C50 is an officially licensed expansion card for the Xbox Series X|S, the alternative to Seagate's. Unlike the PS5, the Xbox Series X|S does not take a standard M.2 drive: it uses a plug-in expansion card. Cheapest today: SANDISK Optimus GX C50 Storage Expansion Card for Xbox at £88.99 (£173.81/TB), as of 21 October 2026.
The detail
It uses the same slot and works the same way as the Seagate card. Choose between them on price per terabyte.
For comparison, external USB storage on these consoles is for archiving current games and playing older ones. Only the built-in drive and the expansion card can run Series X|S titles.
Live prices right now
| Product | Capacity | Price | Price per TB | Tech | Prime | Buy |
|---|---|---|---|---|---|---|
| SANDISK Optimus GX C50 Storage Expansion Card for Xbox, 512GB | Officially licensed NVMe SSD Expansion for Xbox Series X|S, 1 Month Xbox Game Pass & 1 Month Discord Nitro, Plug & Play, | 512 GB | £88.99 | £173.81 | NVMe | Prime | Buy on Amazon |
| SANDISK Optimus GX C50 Storage Expansion Card for Xbox, 1TB | Officially licensed NVMe SSD Expansion for Xbox Series X|S, 1 Month Xbox Game Pass & 1 Month Discord Nitro, Plug & Play, | 1 TB | £213.99 | £213.99 | NVMe | Prime | Buy on Amazon |
Related comparisons and guides
Related on this site: Xbox Series X|S storage, Seagate card vs WD C50, Xbox card 1TB, Xbox card 2TB.
More to read: Switch 2 microSD Express, Switch 2 internal storage, Old microSD in a Switch 2?, 2TB, All guides.
Frequently asked questions
Is the WD_BLACK C50 as good as the Seagate expansion card?
Both are officially licensed and run games directly from the card. Buy whichever is cheaper per terabyte.
What is today's lowest price?
Cheapest today: SANDISK Optimus GX C50 Storage Expansion Card for Xbox at £88.99 (£173.81/TB), as of 21 October 2026.
Is the C50 just an M.2 SSD in a case?
It is a sealed card in Microsoft's proprietary format. A bare M.2 SSD does not plug into the console.
Is the C50 as fast as the Xbox's own storage?
It is built to match it, which is why Series X|S games can be played directly from the card.
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Last updated: 2026-10-19 06:04:47 UTC. As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date indicated on Amazon.co.uk and are subject to change. Any price displayed at the time of purchase will apply. CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON SERVICES LLC. THIS CONTENT IS PROVIDED AS IS AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.