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Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)

Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)

Bottom line: The Seagate Exos X14 ST12000NM0008 12 TB Hard Drive ($540.56 on Amazon as of 2026-10-08): 12TB helium-sealed capacity at 7200 RPM with a 256 MB cache; main trade-off: SATA 6Gb/s ceiling trails SAS and NVMe enterprise alternatives.

$540.56

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Buy on Amazon — $540.56 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 2026-10-08. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 12TB helium-sealed capacity at 7200 RPM with a 256 MB cache
  • ✓ 261 MB/s max sustained transfer on the outer diameter
  • ✓ 2.5M-hour MTBF rating aimed at 24/7 enterprise duty
  • ✓ PowerBalance tuning holds idle draw to about 5.0W average
  • ✓ FastFormat 512e/4Kn support fits both legacy and modern arrays

Cons

  • ✗ SATA 6Gb/s ceiling trails SAS and NVMe enterprise alternatives
  • ✗ 170 IOPS random read 4K QD16 is slow for database or VM work
  • ✗ 3.5" internal form factor needs a bay and direct SATA power
  • ✗ 7200 RPM platters add audible seek noise in a desk-side case

Manufacturer description

Specifications Mfr Part Number: ST12000NM0008 capacity: 12TB spindle Speed: 7200 RPM Cache: 256 MB interface: SATA 6GB/s Max. Sustained transfer rate OD: 261, 249 MB/s average latency: 4.16 ms random read 4K QD16 WCD: 170 IOPS Random Write 4K QD16 WCD: 418 IOPS shock: operating (read/write): 70/40GS @ 2ms Non-operating: 250GS @ 2ms vibration: Non-operating: 2.27GS @ 2Hz to 500Hz power consumption: idle average: 5.0W Max operating, random read/write 4K/16Q power: 10.0W, 6.0W power supply requirements:  +12V and +5V MTBF: 2, 500, 000 hours Dimensions (WxDxH): 4.010 x 5.787 x 1.028 inch/…

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SpecPicks Verdict

SpecPicks scored Seagate Exos X14 ST12000NM0008 12 TB Hard Drive using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Compare with similarly-priced alternatives in the external storage category before committing. 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.

Key Features

  • Standard Model FastFormat (512e/4Kn)
  • Helium sealed-drive design
  • PowerBalance feature optimizes IOPS/Watt
  • Ideal for business critical applications, enterprise data archiving, surveillance storage
  • Enterprise-class reliability backed by 2.5M-hr MTBF rating

Full Specifications

BrandSeagate
Colorsilver
Model NameExos X14
Read Speed261 megabytes_per_second
Unit Count1 Count
Form Factor3.5-inch
Media Speed261
Model NumberST12000NM0008
Built-In MediaHard Drive
Item Type NameHard Drive
Hard-Drive Size12 TB
Mfr Part NumberST12000NM0008
Number of Items1
Special FeaturePortable
Installation TypeInternal Hard Drive
Compatible DevicesDesktop
Data Transfer Rate1 gigabits_per_second
Additional FeaturesPortable
Hard Disk InterfaceSerial ATA-600
Warranty Description5 Years

Ready to buy?

Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600) 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 — $540.56

*Price sourced from Amazon.com. Last updated 2026-10-08. Price and availability subject to change.

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Seagate Exos X14 ST12000NM0008 12 TB Hard Drive - 3.5" Internal - SATA (SATA/600)
$540.56
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