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Seagate Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0… competes with other External Storage products on SpecPicks. Use our Compare tool to view specs side-by-side, or browse the full External Storage category for alternatives.

Seagate

Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC (STKM2000400)

Name: Seagate Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC (STKM2000400)
Brand: Seagate
SKU: B08ZJG6TVT
Price: 119.90 USD
Availability: InStock

By SpecPicks Editorial · Verified 2026-07-22

$119.90

Buy on Amazon — $119.90 Compare to similar external storage

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.

Bottom line: The Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC (STKM2000400) is a niche pick — read recent reviews before buying in the external storage category, priced around $119.90. Read recent reviews carefully before committing.

Expansion portable drive is an easy-to-use solution for instantly adding storage to Windows or Mac—and taking those files on the go. Take advantage of fast data transfer speeds with USB 3.0 and consolidate files into a single location. Free up space on your computer with a simple drag and drop—file saving is that easy.

SpecPicks Verdict

SpecPicks classifies Seagate Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB… as a niche pick — read recent reviews before buying in the external storage category, based on our editorial and benchmark analysis and our ranking model that weights rating × review-volume × price-fit. Seagate's positioning sits within the broader category mid-tier. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.

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 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.

Pros & Cons

Pros

✓ Drag-and-drop file saving
✓ 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

Sleek and simple portable drive design for taking photos, movies, music, and more on-the-go
Drag-and-drop file saving
USB 3.0 powered
Automatic recognition of Windows and Mac computers for simple setup (Reformatting required for use with Time Machine)
Enjoy peace of mind with the included limited warranty and Rescue Data Recovery Services
The available storage capacity may vary.

Full Specifications

Brand	Seagate
Color	Black
Item Width	81.1 Millimeters
Model Name	Seagate Expansion
Read Speed	120 Megabytes Per Second
Unit Count	1.0 Count
Form Factor	Portable
Item Length	122.3 Millimeters
Media Speed	120 Megabytes Per Second
Connectivity	USB
Model Number	STKM2000400
Compatibility	PC, Mac
Built-In Media	Seagate ExpansionPortable Drive 2TB USB3.0
Item Type Name	Portable Hard Drive

Ready to buy?

Seagate Expansion Portable, 2TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC (STKM2000400) 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.

Check price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-07-22. Price and availability subject to change.