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Seagate Expansion 12TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP12000402)
Seagate

Seagate Expansion 12TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP12000402)

Bottom line: The Seagate Expansion 12TB External Hard Drive HDD ($429.99 on Amazon as of 2026-10-21 14:15 UTC): 12TB capacity handles large photo, video, and game archives without pruning; main trade-off: needs the 18W power adapter, so it is not bus-powered or truly portable.

$429.99

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Buy on Amazon — $429.99 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

  • ✓ 12TB capacity handles large photo, video, and game archives without pruning
  • ✓ Rescue Data Recovery Services included with the STKP12000402 model
  • ✓ USB 3.0 transfers instead of slower USB 2.0 desktop drive connections
  • ✓ Auto-recognized by Windows and Mac with no software install required

Cons

  • ✗ Needs the 18W power adapter, so it is not bus-powered or truly portable
  • ✗ Time Machine use requires reformatting the drive first
  • ✗ Included USB cable is only 18 inches, limiting desk placement
  • ✗ Spinning HDD, so speeds trail an external SSD

Manufacturer description

The Seagate Expansion 12TB External Hard Drive is a desktop-class storage box built for people who have run out of room for photo libraries, video projects, game installs, and system backups. Connect the included 18-inch USB 3.0 cable and 18W power adapter, and the drive is recognized automatically by Windows and Mac machines with no software to install. From there it is drag-and-drop: move files across, and the transfer runs over USB 3.0 rather than the slower USB 2.0 path older desktop drives rely on. Mac owners who want Time Machine support will need to reformat the drive first, but the…

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SpecPicks Verdict

SpecPicks scored Seagate Expansion 12TB External Hard Drive HDD 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

Does the Seagate Expansion 12TB work with a Mac?

Yes. It is automatically recognized by Windows and Mac computers with no software required. To use it with Apple Time Machine, you need to reformat the drive first.

What comes in the box?

The drive ships with an 18-inch USB 3.0 cable and an 18W power adapter. No additional software is required for setup.

Do I need to install software to use it?

No. Plug in the power adapter and USB cable, and the drive is recognized automatically. Saving files is drag-and-drop right out of the box.

Is data recovery included if the drive fails?

This model (STKP12000402) includes Seagate Rescue Data Recovery Services. Check the product listing for current coverage terms and duration.

Do I actually get the full 12TB of storage?

Seagate notes that available storage capacity may vary, so formatted usable space will be somewhat less than the 12TB advertised figure.

Key Features

  • Easy-to-use desktop hard drive—simply plug in the power adapter and USB cable.Specific uses: Business, personal
  • Fast file transfers with USB 3.0
  • Drag-and-drop file saving right out of the box
  • Automatic recognition of Windows and Mac computers for simple setup (Reformatting required for use with Time Machine)
  • The available storage capacity may vary.

Full Specifications

BrandSeagate
ColorBlack
Model NameExpansion Desktop Drive
Read Speed120 Megabytes Per Second
Unit Count1.0 Ounce
Form Factor3.5-inch
Media Speed120 MB/s
ConnectivityUSB
Model NumberSTKP12000402
CompatibilityMac
Built-In MediaSeagate Expansion Desktop External Drive 12TB USB3.0
Hard-Drive Size12 TB
Number of Items1
Special FeaturePortable
Installation TypePlug In
Compatible DevicesDesktop
Data Transfer Rate480 Megabits Per Second
Enclosure MaterialMetal
Additional FeaturesPortable
Hard Disk InterfaceUSB 3.0

Ready to buy?

Seagate Expansion 12TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP12000402) 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 — $429.99

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

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Seagate Expansion 12TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP12000402)
$429.99
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