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Seagate Storage Expansion Card for Xbox Series X|S, 1TB, SSD, NVMe Expansion SSD (STJR1000400)
Seagate

Seagate Storage Expansion Card for Xbox Series X|S, 1TB, SSD, NVMe Expansion SSD (STJR1000400)

Bottom line: The Seagate Storage Expansion Card for Xbox Series X ($249.99 on Amazon as of 2026-10-21 14:15 UTC): Runs Series X|S optimized games natively, no move-to-internal step first; main trade-off: xbox Series X|S only, no use with PC, PS5, or older Xbox consoles.

$249.99

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Buy on Amazon — $249.99 Compare to similar external storage

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For external drives and portable storage, synthesises manufacturer specs and independent reviews rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Runs Series X|S optimized games natively, no move-to-internal step first
  • ✓ 1TB roughly doubles a Series X's usable install space
  • ✓ Quick Resume works across internal and card, swap titles in seconds
  • ✓ Tool-free rear-port install, recognized instantly, no enclosure or cable

Cons

  • ✗ Xbox Series X|S only, no use with PC, PS5, or older Xbox consoles
  • ✗ Proprietary card format costs more per TB than a standard NVMe drive
  • ✗ Occupies the console's single expansion slot, so no stacking two cards
  • ✗ 1TB fills fast when modern titles run 100GB or more each

Manufacturer description

Expand your Xbox Series X|S library without touching a single graphics setting. The Seagate Storage Expansion Card is a 1TB NVMe SSD co-engineered with Xbox, so it plugs into the console's rear expansion port and behaves exactly like the internal drive. That matters more than raw capacity: because it speaks the Xbox Velocity Architecture natively, Series X|S optimized titles run straight off the card at full speed, with no drop in load times, framerates, or texture streaming. Quick Resume works across both drives too, so you can hop between several suspended games in seconds regardless of…

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SpecPicks Verdict

SpecPicks scored Seagate Storage Expansion Card for Xbox Series X using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Seagate's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Do I have to move games to the internal SSD to play them?

No. Xbox Series X|S optimized games play directly from the expansion card at the same speed as the internal SSD, with no sacrifice in graphics, latency, load times, or framerates.

Will this work with my Xbox One or a gaming PC?

No. This is a custom-engineered card designed in partnership with Xbox for the Series X|S expansion port only. For an Xbox One or PC you would need a standard external or internal drive instead.

How many games will 1TB actually hold?

It depends on the titles. Seagate positions the 1TB card as adding enough capacity to collect thousands of games across four generations of Xbox, though current-gen releases that run 100GB or more will use it up much faster than older ones.

Does Quick Resume still work with games stored on the card?

Yes. Quick Resume lets you switch between multiple titles in seconds directly from either the internal SSD or the expansion card, so suspended games behave the same on both.

What warranty and support come with the card?

Seagate includes a 3-year limited warranty. Check the product listing for current terms and registration details in your region.

Key Features

  • SEAMLESS GAMEPLAY Designed in partnership with Xbox to seamlessly play Xbox Series X|S games from the internal SSD or the expansion card without sacrificing graphics, latency, load times or framerates
  • HIGH CAPACITY 1 TB of storage increases the overall capacity of the Xbox Series X|S — collect thousands of games across four generations of Xbox without sacrificing performance
  • DESIGNED FOR XBOX Providing faster load times, richer environments and more immersive gameplay
  • QUICK RESUME Switch between multiple titles in seconds — directly from the internal SSD or the expansion card
  • WARRANTY Enjoy long-term peace of mind with the included 3-year limited warranty

Full Specifications

BrandSeagate
ColorGrey
Item Width31.6 millimeters
Model NameSeagate Expansion Card
Read Speed300 megabytes_per_second
Unit Count1 Count
Form FactorPortable
Item Length7.8 millimeters
Media Speed3000 MB/s
Model NumberSTJR1000400
CompatibilityXbox, Switch
Built-In MediaSSD 1TB Expansion Card for Xbox X/S SSD
Hard-Drive Size1 TB
Mfr Part NumberSTJR1000400
Number of Items1
Special FeaturePortable
Hardware PlatformXbox Series X
Installation TypeExternal Hard Drive
Compatible DevicesGaming Console
Data Transfer Rate550 megabits_per_second

Ready to buy?

Seagate Storage Expansion Card for Xbox Series X|S, 1TB, SSD, NVMe Expansion SSD (STJR1000400) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $249.99

*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.

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Seagate Storage Expansion Card for Xbox Series X|S, 1TB, SSD, NVMe Expansion SSD (STJR1000400)
$249.99
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