Seagate Expansion 18TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP18000400)

Name: Seagate Expansion 18TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP18000400)
Brand: Unbranded
SKU: B092R6HW7L

Status: Seagate Expansion 18TB External Hard Drive HDD… (18TB hard drive): Unavailable on Amazon as of 2026-10-20 04:26 UTC. SpecPicks has no in-stock 18TB hard drive on file; an Amazon search for "18TB hard drive" lists current offers with the same specs. eBay sellers may still list this model new or used.

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Bottom line: The Seagate Expansion 18TB External Hard Drive HDD: 18TB of desktop capacity for photos, video libraries and full-system backups; main trade-off: reformatting required before Apple Time Machine will use it.

Unavailable on Amazon as of 2026-10-20 04:26 UTC

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-20

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. About the author →

Pros & Cons

Pros

✓ 18TB of desktop capacity for photos, video libraries and full-system backups
✓ Plug-in-and-go setup: power adapter plus USB cable, no software install
✓ Rescue Data Recovery Services included with the limited warranty
✓ Auto-recognized by Windows and Mac out of the box
✓ Drag-and-drop file saving with no configuration step

Cons

✗ Reformatting required before Apple Time Machine will use it
✗ Desktop unit needs an AC power adapter, so it is not bus-powered
✗ Ships with an 18-inch cable, short for behind-desk placements
✗ Usable capacity is lower than the 18TB label, per Seagate's own note

Manufacturer description

Ideal for the home, office, or dorm, Seagate Expansion desktop drive offers enormous desktop storage for photos, movies, music, and more. Backing up and transferring content is incredibly easy—just drag and drop! To get set up, connect the USB hard drive to Windows or Mac—no software required. For Apple Time Machine, simply reformat. Included is an 18-inch USB 3.0 cable and 18W power adapter.

SpecPicks Verdict

SpecPicks scored Seagate Expansion 18TB External Hard Drive HDD 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

Easy-to-use desktop hard drive—simply plug in the power adapter and USB cable
Fast file transfers with USB 3.1
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)
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
Model Name	Expansion
Read Speed	120 megabytes_per_second
Unit Count	1 Count
Form Factor	3.5-inch
Connectivity	USB
Model Number	STKP18000400
Compatibility	Mac
Built-In Media	Seagate Expansion Desktop External Drive 18TB USB3.0
Item Type Name	Hard Drive
Hard-Drive Size	18 TB
Mfr Part Number	STKP18000400
Number of Items	1
Special Feature	Portable
Installation Type	External Hard Drive
Compatible Devices	Desktop PC
Data Transfer Rate	5000 megabytes_per_second
Enclosure Material	Information Not Available
Additional Features	Portable

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