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Seagate Storage Expansion Card for Xbox Series X|S

SeagateSSD

Storage Expansion Card for Xbox Series X|S

Released November 2020.6Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 2026Says the 1TB card will be available on November 10. The dateline year is 2020 Last checked 21 October 2026.

Interface
PCIe NVMe
Form factor
Xbox expansion card
Capacity
512 GB, 1 TB, 2 TB, 4 TB
Read speed
Not available

21 of 63 fields known.

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All specs

SourceCalculated

General

Series
Not available
Model numbers
STJR512400, STJR1000400, STJR2000400, STJR40004002Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Specifications table: STJR1000400, STJR2000400 and STJR40004003Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026Seagate data sheet DS2081.2-2412US, the last one that lists the 512GB model STJR512400 with STJR1000400 and STJR20004004Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Data sheet DS2081.4-2504US of April 2025 lists STJR1000400 and STJR2000400 only
GTIN / EAN
763649170410, 8719706042659, 763649142950, 8719706023757, 763649170311, 8719706042550, 763649182376, 87197060452092Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026UPC and EAN rows. 1TB UPC 763649142950, EAN 8719706023757. 2TB UPC 763649170311, EAN 8719706042550. 4TB UPC 763649182376, EAN 8719706045209. The multi-pack UPCs are not stored3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026512GB UPC 763649170410 and EAN 87197060426594Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same UPC and EAN values as the 2501 sheet
Announced
24 September 20206Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 2026Press release dated September 24, 2020
Status
Available11Retailer pageamazon.com/dp/B08K48F6QZRead 15 October 2026Amazon US listing for the 1TB, STJR1000400, with 10,228 ratings and rank 117 in External Solid State Drives on 2026-10-15. Seagate's own store shows no stock, so the status rests on the retail listings. The listing's weight of 30 g and its USB connectivity entry are not stored
Predecessor
Not available
Successor
Not available
Launch price (US)
$399.996Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 20261TB at $219.99, US7Press releasenews.xbox.com/en-usRead 15 October 2026Xbox Wire post of October 21, 2021: the 512GB card is $139.99 USD with launch in mid-November and the 2TB card is $399.99 USD with launch in early December. US only. The base price is the 2TB model8Press releaseseagate.com/ca/en/stories/articles/seagate-unveils-4tb-storage-expansion-card-for-xbox-series-x-s-the-ideal-storage-upgrade-for-players-prRead 15 October 2026Press release of June 9, 2025: the 4TB card is now available for $499.99 at the Seagate store and Best Buy. US
Launch price (EU)
From €239.992Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 20263Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20266Press releaseseagate.com/news/news-archive/the-new-seagate-storage-expansion-card-for-xbox-series-x-pr-masterRead 15 October 20267Press releasenews.xbox.com/en-usRead 15 October 20268Press releaseseagate.com/ca/en/stories/articles/seagate-unveils-4tb-storage-expansion-card-for-xbox-series-x-s-the-ideal-storage-upgrade-for-players-prRead 15 October 20269Press articlewinfuture.de/news,118473.htmlRead 15 October 202612Press articlegamesbeat.com/xbox-series-x-seagate-expansion-card-teardownRead 21 October 202613Press articlethesixthaxis.com/2020/10/16/xbox-series-x-ssd-expansion-card-teardown-4d-nand-phison-e19t-pcie-speedRead 21 October 202614Press articletweaktown.com/news/75722/xbox-series-ssd-sk-hynix-4d-tlc-nand-phison-e19-memory-controller/index.htmlRead 21 October 2026
Markets
Not available
Colours
Not available
Form factor
Xbox expansion card1Maker product pageseagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-xRead 15 October 2026The page says the card installs in the expansion storage slot of the console
Capacity
512 GB, 1 TB, 2 TB, 4 TB2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Footnote: one gigabyte equals one billion bytes and one terabyte equals one trillion bytes

Interface

Interface
PCIe NVMe10Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Review of the 1TB card dated December 9, 2020. The spec table names the flash as Custom PCIe Gen4x2 NVMe, and Seagate's 4TB review table names PCIe Gen4 NVMe. The card connects through the console's proprietary expansion port, so Seagate and the Xbox pages name no standard interface
PCIe generation
410Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Spec table row reads Custom PCIe Gen4x2 NVMe, so generation 4. Seagate itself publishes no PCIe generation
PCIe lanes
210Reviewstoragereview.com/review/seagate-storage-expansion-card-for-xbox-series-xs-reviewRead 15 October 2026Same row: Gen4x2, so two lanes. Retailer listings such as Best Buy also say PCIe Gen 4 x2
NVMe version
Not available
Detachable cable
Not available

Hardware

Controller
Phison E19T12Press articlegamesbeat.com/xbox-series-x-seagate-expansion-card-teardownRead 21 October 2026GamesBeat (VentureBeat) teardown of 15 October 2020, updated 20 June 2025, of a 1TB Seagate card the author received from Microsoft with the preview Xbox Series X hardware. The text reads: the controller is the Phison E19T PCIe Gen 4 controller. No other capacity was opened, so the controller of the 512GB, 2TB and 4TB cards is not confirmed and Seagate names none13Press articlethesixthaxis.com/2020/10/16/xbox-series-x-ssd-expansion-card-teardown-4d-nand-phison-e19t-pcie-speedRead 21 October 2026TheSixthAxis report of 16 October 2020 on the same VentureBeat teardown of the 1TB card: it combines a Phison E19T SSD controller with a single 1TB chip of SK Hynix's 4D NAND14Press articletweaktown.com/news/75722/xbox-series-ssd-sk-hynix-4d-tlc-nand-phison-e19-memory-controller/index.htmlRead 21 October 2026TweakTown news of 16 October 2020 on the GamesBeat teardown: the SSD card uses Phison's E19T memory controller
Flash type
Not available
Flash memory
Not available
Flash layers
Not available
DRAM cache
Not available
DRAM cache size
Not available
Component sides
Not available

Performance

We could not find any of these 4 fields. Show them
Sequential read (claimed)
Not available
Sequential write (claimed)
Not available
Random 4K read (claimed)
Not available
Random 4K write (claimed)
Not available

Endurance and reliability

Endurance (TBW)
Not available
MTBF or MTTF (claimed)
Not available
Operating temperature
Min5Max35°C2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Notes row reads 5-35 degree C. The sheet gives no storage range3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20265-35 degree C, the same as the newer sheets

Power

We could not find any of these 6 fields. Show them
Power while reading (claimed)
Not available
Power while writing (claimed)
Not available
Max power consumption (claimed)
Not available
Average power in light use (claimed)
Not available
Idle power (claimed)
Not available
Sleep power (claimed)
Not available

Measured

We could not find any of these 9 fields. Show them
Sequential read (measured)
Not available
Sequential write (measured)
Not available
Random 4K read at queue depth 1 (measured)
Not available
Random 4K write at queue depth 1 (measured)
Not available
Write cache size (measured)
Not available
Write speed after the cache (measured)
Not available
3DMark Storage Benchmark
Not available
Highest temperature under load (measured)
Not available
Idle power (measured)
Not available

Cooling and build

We could not find any of these 4 fields. Show them
Heatsink
Not available
RGB lighting
Not available
Dust and water rating
Not available
Drop test height
Not available

Security and software

We could not find any of these 2 fields. Show them
Security
Not available
Software
Not available

Compatibility

Platforms
Xbox Series X|S1Maker product pageseagate.com/products/gaming-drives/xbox-gaming/storage-expansion-for-xbox-series-xRead 15 October 2026Page names Xbox Series X|S. Games of the original Xbox, Xbox 360 and Xbox One are stored on it, but they run on the Series console

Dimensions and weight

Front and side, drawn to scale.

Dimensions
Length52.95Width31.6Height8.8mm(2.1 × 1.2 × 0.3 in)2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Product Dimensions rows are labelled Length 8.8 mm, Width 31.6 mm and Height 52.95 mm. The height row is the long side, so it is stored as length, and the thickness 8.8 mm as height. The 4TB column reads Height 59.3 mm instead of 52.95 mm, which is stored for the 4TB row3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 2026This older sheet gives a thickness of 7.8 mm and a long side of 52.95 mm for all three capacities. The newer sheets give 8.8 mm for 1TB and 2TB, so 7.8 mm is stored only for the 512GB row, which the newer sheets do not cover4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same 8.8 x 31.6 x 52.95 mm as the 2501 sheet
Weight
26g(0.9 oz)2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Weight row reads 0.026 kg for 1TB and 2TB and 0.027 kg for 4TB3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20260.03 kg for 512GB, 1TB and 2TB. The newer sheets give 0.026 kg for 1TB and 2TB. 30 g is stored only for the 512GB row4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 20260.026 kg for 1TB and 2TB

In the box

In the box
Seagate Storage Expansion Card for Xbox Series X|S, Protective Cover, Quick Start Guide2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026What's Included lists the card, Protective Cover and Quick Start Guide4Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-4-2504US-en_US.pdfRead 15 October 2026Same What's Included list
Cables included
Not available

Warranty

Manufacturer warranty (source market)
3years2Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series-4tb/xbox-expansion-card-series-4tb-DS2081-3-2501US-en_US.pdfRead 15 October 2026Warranty, Limited (years) row reads 3 for all three capacities. The sheet is worldwide (Region WW) and names no market3Maker spec sheet (PDF)seagate.com/content/dam/seagate/en/content-fragments/products/datasheets/xbox-expansion-card-series/xbox-expansion-card-series-DS2081-2-2412US-en_US.pdfRead 15 October 20263 years, the same as the newer sheets

Compare with

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Variants

Each variant lists only what differs from the specs above.

Model numberGTINGTIN / EANLaunch price (US)Launch price (EU)CapacityFlash memoryDimensionsWeight
STJR512400763649170410763649170410, 8719706042659$139.99Not available512 GBNot availableLength 52.95, Width 31.6, Height 7.8 mm30 g
STJR1000400763649142950763649142950, 8719706023757$219.99€239.991 TBSK hynix 4D NANDLength 52.95, Width 31.6, Height 8.8 mm26 g
STJR2000400763649170311763649170311, 8719706042550$399.99Not available2 TBNot availableLength 52.95, Width 31.6, Height 8.8 mm26 g
STJR4000400763649182376763649182376, 8719706045209$499.99Not available4 TBNot availableLength 59.3, Width 31.6, Height 8.8 mm27 g

Sources

We read 14 sources for this SSD. The numbers match the markers in the sheet.

  1. Read 15 October 2026Backs 3 fields
  2. Read 15 October 2026Backs 10 fields
  3. Read 15 October 2026Backs 7 fields
  4. Read 15 October 2026Backs 5 fields
  5. Read 15 October 2026Backs 1 field
  6. Read 15 October 2026Backs 4 fields
  7. Press releasenews.xbox.com/en-us
    Read 15 October 2026Backs 2 fields
  8. Read 15 October 2026Backs 2 fields
  9. Read 15 October 2026Backs 1 field
  10. Read 15 October 2026Backs 3 fields
  11. Read 15 October 2026Backs 1 field
  12. Read 21 October 2026Backs 2 fields
  13. Read 21 October 2026Backs 2 fields
  14. Read 21 October 2026Backs 2 fields

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