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Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 (STEB3000100)
Seagate

Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 (STEB3000100)

Bottom line: The Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 ($153.60 on Amazon as of 2026-10-21 08:15 UTC): 3TB capacity consolidates large photo, video, and game libraries onto one desktop drive; main trade-off: requires reformatting for Mac, which erases any content already on the drive.

$153.60

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Buy on Amazon — $153.60 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

  • ✓ 3TB capacity consolidates large photo, video, and game libraries onto one desktop drive
  • ✓ USB 3.0 interface delivers SuperSpeed transfers, backward compatible with USB 2.0
  • ✓ Windows recognizes it automatically - no software to install or configure
  • ✓ Drag-and-drop file saving works out of the box on Windows 7 or higher

Cons

  • ✗ Requires reformatting for Mac, which erases any content already on the drive
  • ✗ Needs an external power adapter, so it is not travel- or bus-powered friendly
  • ✗ Desktop 3.5-inch form factor is bulkier than a portable pocket drive
  • ✗ No listed brand field in this catalog entry beyond the Seagate Expansion name

Manufacturer description

The Seagate Expansion Desktop hard drive provides extra storage for an ever growing collection of files. Consolidate files into a single location and free up computer space. The drive is automatically recognized by the Windows operating system so there’s no software to install or configure. Saving files is easy—simply drag and drop. Take advantage of fast data transfer speeds with the USB 3.0/2.0 interface;System_requirement:Windows 7 or higher operating system. SuperSpeed USB 3.0 port (required for USB 3.0 transfer speeds or backwards compatible with USB 2.0 ports at USB 2.0 transfer speed)

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SpecPicks Verdict

SpecPicks scored Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 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

  • Easy-to-use desktop hard drive—simply plug in the power adapter and USB cable; Fast file transfers with USB 3.0/2.0
  • System requirements: Windows 8, Windows 7 operating system
  • Drag-and-drop file saving for Windows, right out of the box
  • For Mac compatibility This hard drive requires reformatting. Reformatting the Drive will erase all content unless it is backed up to another drive. Refer to application guide for guidance on this.
  • The available storage capacity may vary.

Full Specifications

BrandSeagate
ColorBlack
Model NameSEAGATE (RETAIL)
Unit Count1 Count
Form Factordesktop
Media Speed160
ConnectivityUSB
Model NumberSTEB3000100
CompatibilityMac
Built-In MediaSeagate® Expansion Desktop Drive 3TB USB3.0
Hard-Drive Size3 TB
Mfr Part NumberSTEB3000100
Number of Items1
Special FeatureIncludes external power adapter
Hardware PlatformMac
Installation TypeExternal Hard Drive
Compatible DevicesPC
Data Transfer Rate5000 megabits_per_second
Enclosure MaterialPlastic
Additional FeaturesIncludes external power adapter

Ready to buy?

Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 (STEB3000100) 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 — $153.60

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

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Seagate Expansion 3TB Desktop External Hard Drive USB 3.0 (STEB3000100)
$153.60
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