Seagate

Seagate Storage Expansion Card for Xbox Series X|S 4TB Solid State Drive - NVMe Expansion SSD for Xbox Series X|S (STJR4000400)

Name: Seagate Storage Expansion Card for Xbox Series X|S 4TB Solid State Drive - NVMe Expansion SSD for Xbox Series X|S (STJR4000400)
Brand: Seagate
SKU: B0CNXZS9C5
Price: 167.99 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-11

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$167.99

As an Amazon Associate, SpecPicks earns from qualifying purchases.

View Current Price on Amazon → Compare to similar ssds & storage

*Price sourced from Amazon.com. Last updated 2026-09-08. Price and availability subject to change.

Bottom line: The Seagate Storage Expansion Card for Xbox Series X|S 4TB Solid State Drive - NVMe Expansion SSD for Xbox Series X|S (STJR4000400) is a specs-and-price decision rather than a crowd-consensus one in the ssds & storage category, priced around $167.99. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

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. The only 4TB expansion card—and highest capacity available—that maximizes Xbox Series X storage, allowing you to collect thousands of games across four generations of Xbox without sacrificing performance. Officially licensed storage expansion card designed using Xbox Velocity Architecture to provide faster load times, richer environments, and more immersive game play.

SpecPicks Verdict

SpecPicks scored Seagate Storage Expansion Card for Xbox Series X|S 4TB Solid State… using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis across the ssds & storage category. Seagate's ssds & 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 ssds & 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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Frequently Asked Questions

Will this work with my Xbox One or PS5?

No. The card fits only the dedicated storage expansion port on Xbox Series X and Series S consoles. It is not compatible with Xbox One, PS5, or PC.

Can I just use a cheaper USB external drive instead?

Only for Xbox One and older titles. Xbox Series X|S optimized games must run from the internal SSD or this expansion card, so a USB drive can store them but not play them.

Are games slower when installed on the card?

No. Seagate built the card on the Xbox Velocity Architecture in partnership with Xbox, so load times, framerates, latency, and graphics match the internal SSD.

Does Quick Resume still work from the expansion card?

Yes. You can switch between multiple titles in seconds whether they sit on the internal SSD or on the card.

What warranty does the 4TB card come with?

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

Pros & Cons

Pros

✓ Enjoy long-term peace of mind with the included 3-year limited warranty.
✓ Backed by Seagate's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

Key Features

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.
The only 4TB expansion card—and highest capacity available—that maximizes Xbox Series X storage, allowing you to collect thousands of games across four generations of Xbox without sacrificing performance.
Officially licensed storage expansion card designed using Xbox Velocity Architecture to provide faster load times, richer environments, and more immersive game play.
Quick resume means gamers can switch between multiple titles in seconds—directly from the internal SSD or the expansion card.
Enjoy long-term peace of mind with the included 3-year limited warranty.

Full Specifications

Size	4TB
Brand	Seagate
Color	Black
Model	STJR4000400
Warranty	2 Year Manufacturer
UnitCount	1
ReleaseDate	2025-06-15T00:00:01Z
Manufacturer	Seagate
ItemPartNumber	STJR4000400

Ready to buy?

Seagate Storage Expansion Card for Xbox Series X|S 4TB Solid State Drive - NVMe Expansion SSD for Xbox Series X|S (STJR4000400) is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-09-08. Price and availability subject to change.