Seagate Expansion 4TB USB 3.0 Portable External Hard Drive - Black

Seagate Expansion 4TB USB 3.0 Portable External Hard Drive (STKM4000400) - Black

Model Number: STKM4000400
Web Code: 15565583
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Need some extra storage space? This Seagate Expansion portable external hard drive provides an incredible 4TB of storage capacity so you have plenty of room to save and consolidate your important documents, photos, videos, and more. It features a compact design so it's easy to take with you wherever you go.

Manufacturer's Warranty

Check with the manufacturer for details or purchase Best Buy Protection on the next step.

Return Policy

30 days to return or exchange

Product must be unopened

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What's included:

  • Seagate Expansion Portable Drive
  • 18-inch (45.72cm) USB 3.0 Cable
  • Quick Start Guide
  • Rescue Data Recovery Services
  • 4TB storage capacity offers tonnes of room for photos, videos, games, and other files
  • USB 3.0 technology delivers incredibly fast data transfer speeds for quick and easy operation
  • 2.5" form factor is compact to fit neatly on your desk or in your bag for portability
  • Drag-and-drop capabilities make file transfers effortless
  • Rescue data software helps to keep your files safe and protected
  • Compatible with PC and Mac
Expansion Portable


System Requirements
Windows 10 or Higher or Mac OS X10.12 or higher operating system. Available SuperSpeed USB 3.0 port (required for USB 3.0 transfer speeds)
Storage Drive Type
Portable Hard Drive
Internal or External
USB 3.0
Form Factor
2.5 in
PC and Mac


Storage Capacity
4 TB




Dimensions (cm)
8 (W) x 11.5 (H) x 2.1 (D) cm
Dimensions (in)
3.15 (W) x 4.53 (H) x 0.83 (D) in
Product Weight
0.257 kg
If you find a lower price with another retailer before you buy (or within 30 days of purchase), we’ll gladly match that price. If our own price is reduced within 30 days of purchase, we’ll match it and refund you the difference. Conditions and exclusions apply.