Skip to main content
Seagate 4TB Expansion Portable Hard Drive | MicroB to USB-C (STNN4000400) | New Generation of Everyday HDD storage. Windows & macOS. Lightweight & travel-ready. 1-Year Warranty + 1-Year Rescue
Seagate

Seagate 4TB Expansion Portable Hard Drive

Bottom line: The Seagate 4TB Expansion Portable Hard Drive is a specs-and-price decision rather than a crowd-consensus one in the external storage category, priced around $189.99 on Amazon as of 2026-10-21 12:20 UTC. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.

$189.99

As an Amazon Associate, SpecPicks earns from qualifying purchases. Full disclosure →

Buy on Amazon — $189.99 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

  • ✓ Room for it all: Up to 4TB of space for photos, videos and everything worth keeping.
  • ✓ Backed by Seagate's warranty and support channels

Cons

  • ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

Related Products

Other products in this category you may like:

SpecPicks Verdict

SpecPicks scored Seagate 4TB Expansion Portable Hard Drive 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.

Key Features

  • Room for it all: Up to 4TB of space for photos, videos and everything worth keeping.
  • No fuss. Just storage: Easy everyday storage that’s simple to set up and use, so you can start backing up important files right away.
  • For the “uh, oh” moments: Includes Rescue Data Recovery Services for added protection.
  • Made to move: Portable, lightweight and compact enough for home, school, work, travel, and everything in between.
  • Very compatible: Works with most Windows and macOS systems for use across devices.

Full Specifications

Full listing titleSeagate 4TB Expansion Portable Hard Drive | MicroB to USB-C (STNN4000400) | New Generation of Everyday HDD storage. Windows & macOS. Lightweight & travel-ready. 1-Year Warranty + 1-Year Rescue

Ready to buy?

Seagate 4TB Expansion Portable Hard Drive | MicroB to USB-C (STNN4000400) | New Generation of Everyday HDD storage. Windows & macOS. Lightweight & travel-ready. 1-Year Warranty + 1-Year Rescue 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 — $189.99

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

Related External Storage

Keep exploring SpecPicks

Other buying guides

Browse the catalog

Editorial

More guides & deep dives from the SpecPicks archive

Browse all articles & guides →

More reviews from the SpecPicks archive

Browse all reviews →

Earliest SpecPicks reviews

Browse full archive →
Seagate 4TB Expansion Portable Hard Drive | MicroB to USB-C (STNN4000400) | New Generation of Everyday HDD storage. Windows & macOS. Lightweight & travel-ready. 1-Year Warranty + 1-Year Rescue
$189.99
View on Amazon →