Xbox Series X storage runs out faster than most people expect. The console ships with 1TB but only 802GB is actually usable — and with modern games regularly hitting 100GB or more, that fills up quickly. This guide covers everything: how much space you have, the best ways to expand it, and how to manage what you’ve got.
TL;DR
- The Xbox Series X has 1TB internally, but only 802GB is usable — the rest is reserved for the OS
- To play Series X optimised games from extra storage, you need an official Storage Expansion Card (Seagate or WD Black C50)
- External USB drives are much cheaper but can only run older-gen games directly — Series X games must be transferred back to internal or expansion card storage to play
- The expansion slot is on the back of the console, next to the HDMI port — labelled STORAGE EXPANSION
- As of a recent update, external drives larger than 16TB are now supported
- Game Pass helps reduce storage pressure — you can delete and reinstall titles whenever you want
How Much Storage Does Xbox Series X Have
The Xbox Series X ships with a 1TB custom NVMe SSD. It is fast — significantly faster than the hard drives in older consoles — and it powers features like Quick Resume, which saves the state of multiple games simultaneously so you can switch between them instantly.
The problem is the usable space. Around 198GB is reserved for the operating system and system files, leaving you with approximately 802GB of usable storage for games, apps, and saved data. That sounds like plenty until you start installing games. Call of Duty titles regularly exceed 100GB. A handful of large open-world games can fill the drive entirely.
The Xbox Series S has it tighter. Its 512GB SSD leaves only around 364GB of usable space after the OS takes its share.
Xbox Series X Storage Expansion Card — The Best Option
The cleanest way to expand Xbox Series X storage is with an official Storage Expansion Card. These slot into a proprietary port on the back of the console — right next to the HDMI port, labelled STORAGE EXPANSION. The card is roughly the size of a large USB thumb drive and plugs straight in. No tools, no setup, no formatting. It’s plug and play.
What makes expansion cards special is performance. They use the same Xbox Velocity Architecture as the internal SSD, delivering matching speeds. That means you can play any Series X game directly from the card — load times, Quick Resume, and frame rates are identical to playing from internal storage.
There are currently two manufacturers making licensed expansion cards:
Seagate Storage Expansion Card for Xbox
Seagate was the original and only option at launch. It comes in 512GB, 1TB, 2TB, and 4TB capacities. The 4TB model — the largest available as of 2025 — is the best option for serious collectors who don’t want to manage storage at all. The 1TB model sits around $159 and is the most popular choice. The 2TB and 4TB models are significantly more expensive but useful if you keep a large number of large games installed simultaneously.
WD Black C50 Expansion Card
Western Digital entered the market in 2023 and brought some competition on pricing. The WD Black C50 comes in 512GB, 1TB, and 2TB capacities and performs identically to the Seagate card on speed benchmarks. The 1TB C50 typically retails around $149. Western Digital also added a 2TB model, giving a second option at that capacity tier.
Either card works well. If you want the largest available storage in a single card, the Seagate 4TB is currently the only option. For 1TB or below, the WD Black C50 is often slightly cheaper.
What to Know Before Buying
- Only buy officially licensed cards. There are no third-party alternatives that use the expansion slot — the connector is proprietary.
- The expansion card is the only external storage option that can run Series X optimised games without transferring them
- Quick Resume works from the expansion card just as it does from internal storage
- You can have both the internal drive and one expansion card active simultaneously, doubling your high-performance storage
External USB Storage for Xbox Series X
You can also connect standard external hard drives and SSDs via USB. The Xbox Series X has three USB 3.1 ports — two on the back and one on the front. Any USB 3.0 or higher drive will work.
External USB storage is much cheaper per gigabyte than expansion cards. A 4TB external hard drive costs a fraction of a 1TB expansion card. The trade-off is what you can do with it.
What USB External Storage Can Do
- Store and play Xbox One, Xbox 360, and Original Xbox games directly
- Store (but not play) Series X optimised games — they must be transferred to internal or expansion card storage to launch
- Archive your game library without uninstalling — transfer back when you want to play
- Store game clips, screenshots, and media
This makes external USB drives ideal as an archive. If you have a large backlog of older-generation games, or you want to keep a library of Series X titles without keeping them all ready to run simultaneously, a cheap external hard drive handles that perfectly. You just need to move a game back to internal or expansion card storage when you’re ready to play it.
USB Drive Requirements
- USB 3.0 or higher (USB 3.1 recommended)
- Minimum 128GB capacity
- As of the 10.0.26100.3362 software update, drives larger than 16TB are now supported
Portable SSDs connected via USB offer faster transfer speeds than spinning hard drives, which makes moving games back to internal storage quicker. If you transfer games regularly, a portable USB SSD is worth the extra cost over a standard hard drive.
Expansion Card vs USB External Drive — Which Should You Get
Here is a simple way to decide:
- Get an expansion card if you play current-gen Series X games and want the same experience as internal storage — no transferring, no compromises
- Get an external USB drive if you mainly play older-gen games, want cheap archive space, or want to store games you rotate in and out occasionally
- Get both if you have a large library and want maximum flexibility — use the expansion card for active Series X games and the external drive for everything else
How to Manage Xbox Series X Storage
If you want to delay buying extra storage, smart management goes a long way.
Check Storage Usage
Go to Settings > System > Storage. This shows a breakdown of what is using space across your internal drive and any connected storage. You can see which games are largest and manage them from here.
Move Games Between Storage Devices
You can move games between internal storage, expansion card, and external USB drives directly from the console. Go to My Games & Apps, highlight a game, press the Menu button, and select Manage Game and Add-ons. From there you can move or copy the game to a different storage location.
Use Ready to Install Instead of Keeping Everything Downloaded
Any game you own digitally or through Game Pass can be reinstalled without paying again. Delete games you are not actively playing and reinstall when you want them back. This is especially useful for Game Pass titles — your save data is stored in the cloud, so you pick up exactly where you left off.
Uninstall Unused DLC and Add-ons
Large games often have add-ons, texture packs, or language packs installed automatically. Go to Manage Game and Add-ons and remove any content packs you do not need. Some games offer low and high resolution texture options — removing the higher resolution pack saves significant space if you are not playing on a 4K display.
Keep Saved Data in the Cloud
Xbox automatically backs up saved game data to the cloud for Game Pass Ultimate subscribers. This means you can safely delete games without losing progress. Make sure cloud saves are enabled under Settings > System > Storage > Cloud Saved Games.
Xbox Series X Storage and Game Pass
Game Pass changes how storage pressure works. Instead of owning everything permanently, you install what you want to play now and delete it when you’re done. Your progress saves to the cloud. When you want to return to a game, you reinstall it.
This approach makes 802GB go much further. You effectively use the internal SSD as a rotating selection of active games rather than a permanent collection. The catch is that large downloads take time — if you want to jump into a 100GB game on a whim, you will be waiting a while depending on your internet speed.
For a full look at what Game Pass includes and whether it is worth it, see our Xbox Game Pass Ultimate guide, the full Game Pass games list, and our Game Pass pricing breakdown for 2026. If you’re on the fence, the best games on Game Pass guide shows what you’d actually be downloading.
Xbox Series X 2TB Model — More Built-In Storage
If you are buying a console and already know storage will be a pain point, Microsoft offers a 2TB Xbox Series X variant with a unique starfield finish. It doubles the internal storage and uses identical internal specs to the standard model — same CPU, GPU, and RAM. It costs more than the base model but saves you buying a 1TB expansion card separately, which can work out cheaper overall depending on current prices.
For a full breakdown of the console itself, see our Xbox Series X review and Xbox Series X guide. If you are deciding between hardware options, our Xbox Series X vs Series S comparison covers the storage difference between the two consoles in detail.
Other Xbox Series X Setup Guides
Storage is one piece of a well-configured setup. Once your storage situation is sorted, it is worth making sure your display settings are also dialled in. Our Xbox HDMI 2.1 settings guide covers getting 4K, 120Hz, VRR, and HDR working correctly from end to end. And if you want to see the full list of games worth having installed, check the best Xbox Series X games list alongside the Xbox Series X setup guide for first-time owners.
