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The 1TB inside an Xbox Series X or Series S fills up fast. A couple of big downloads like Call of Duty or Starfield can swallow half of it, and nobody wants to redownload a 150GB game every time the mood strikes. Luckily, Microsoft gives you two ways to add space: official expansion cards that match the internal SSD’s speed, and cheaper USB drives for everything else. Here are our top picks for 2026.
1. Seagate Storage Expansion Card for Xbox Series X|S — best overall
This is the original official card, and it’s still the one to beat. It slides into the expansion port on the back of your console and behaves exactly like the internal SSD: you can play Xbox Series X|S games straight from it, and Quick Resume works across all your titles. It’s also the only expansion card that goes all the way up to 4TB, which is huge if your library never stops growing.
Around $160 for the 1TB version, more for 2TB and 4TB.
2. WD_Black C50 Expansion Card — best warranty and build
Western Digital’s answer to Seagate’s card is also officially licensed by Microsoft, so it delivers the same Velocity Architecture performance and Quick Resume support. Where it stands out is the build: a sleek industrial design that matches the console, and a 5-year warranty that beats everyone else. It comes in 512GB, 1TB, and 2TB sizes.
Around $200 for the 1TB version.
3. SanDisk Optimus GX C50 — newest official option
SanDisk launched its own officially licensed expansion card in late 2026, joining Seagate and WD in the expansion-slot game. It matches the internal SSD performance just like the others, with Quick Resume and plug-and-play setup, and it launched at prices that undercut its rivals to win gamers over. If you spot it on sale, it’s a strong value.
Around $200 for the 1TB version at launch pricing.
4. WD_Black P40 Game Drive SSD — best USB drive for game shuttling
Here’s the important catch with USB drives on Xbox: they can’t play Xbox Series X|S games directly — those have to run from the internal or expansion SSD. But the P40 is the fastest way to park them. With up to 2,000MB/s transfer speeds, copying a Series X|S game back and forth is dramatically quicker than with a hard drive, and you can play all your Xbox One, Xbox 360, and original Xbox games straight from it. The RGB strip is a fun bonus.
Around $150 for the 1TB version.
5. Samsung T7 Portable SSD — best budget USB SSD
The T7 has been a favorite for years, and it still delivers: up to 1,050MB/s speeds in a slim metal body that’s easy to carry anywhere. Like the P40, it plays backward-compatible games directly and stores Series X|S titles you can move back to internal storage when you want to play them. It usually goes for far less than the official expansion cards.
Around $100 for the 1TB version.
6. Seagate Game Drive for Xbox 2TB — most storage per dollar
If you just need a big parking lot for your library, a classic portable hard drive still wins on price. This Xbox-certified drive plugs into a USB port, plays all your backward-compatible games, and stores Series X|S games for quick transfer back to the console. It’s not fast, but it’s cheap and roomy — perfect as a “cold storage” archive next to your main drive.
Around $90 for the 2TB version.
More storage picks in our shop
We keep a running list of the storage gear we recommend in the GrabYourLoot shop — SSDs, controllers, headsets and more, all hand-picked.
What to look for
The single most important decision is whether you want to play current-gen games directly from the extra storage. Only the official expansion cards (Seagate, WD_Black C50, SanDisk Optimus GX) can do that — they plug into the dedicated slot and match the internal SSD. USB drives (SSD or HDD) are much cheaper and great for backward-compatible games, but Series X|S titles must be moved back to internal storage to launch.
Second, think about size. Modern AAA games routinely top 100GB, so 1TB is the sweet spot for most players, and 2TB is worth it if you juggle Game Pass downloads. Finally, check the warranty: expansion cards run pricier, so a 5-year warranty like WD’s is real value.
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