Seagate Expansion 4TB Mobile External Hard Drive in Black - USB3.0 PC MAC BNIB

Seagate Expansion STKM4000400 external hard drive 4 TB 2.5" 3.2 Gen 1 (3.1 Gen 1) Black

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Seagate Expansion Portable, 4TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM4000400)

£124.89
Delivery from £6.50

Seagate Expansion 4TB Mobile External Hard Drive in Black - USB3.0 PC MAC BNIB

Overall Rating: 1.2 / 5 (average from multiple review sources, as of 9 Mar 2026)
Based on a total of 22,600 customer reviews from independent review platforms.

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£104.92
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Seagate Expansion Portable, 4TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM4000400)

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£124.89
Delivery from £6.50

Seagate Expansion STKM4000400 external hard drive 4 TB Black

Overall Rating: 3.2 / 5 (average from multiple review sources, as of 11 Mar 2026)
Based on a total of 43 customer reviews from independent review platforms.

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The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

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Seagate Expansion STKM4000400 external hard drive 4 TB Black

Standard delivery in 3 working days
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£124.99
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Seagate Expansion 4TB External Portable Hard Drive (STKM4000400)

Overall Rating: 4.7 / 5 (average from multiple review sources, as of 12 Mar 2026)
Based on a total of 27,859 customer reviews from independent review platforms.

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The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

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£124.99
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Seagate Expansion Portable, 4TB, External Hard Drive, 2.5 Inch, USB 3.0, for Mac and PC, 2 year Rescue Services (STKM4000400)

In stock
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£129.89
Delivery from £4.49

Seagate Expansion 4TB USB-A Portable External Hard Drive One Size Black

Overall Rating: 3.7 / 5 (average from multiple review sources, as of 1 Mar 2026)
Based on a total of 118,287 customer reviews from independent review platforms.

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3-7 working days
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£129.99
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Seagate Expansion 4TB USB-A Portable External Hard Drive Seagate Expansion 4TB USB-A Portable External Hard Drive

Overall Rating: 4.5 / 5 (average from multiple review sources, as of 3 Mar 2026)
Based on a total of 109,511 customer reviews from independent review platforms.

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3 to 7 Days
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£129.99
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Seagate 4TB Expansion USB3.0

Overall Rating: 3.3 / 5 (average from multiple review sources, as of 3 Mar 2026)
Based on a total of 553 customer reviews from independent review platforms.

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The values are derived from publicly available retailer ratings from platforms such as Feefo, http://Reviews.io , Trustpilot, and others, and are aggregated monthly.

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1-3 days
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Product Information

Logistics data

Harmonized System (HS) code 84717050

Weight & dimensions

Weight 257 g
Height 115.3 mm
Depth 20.9 mm
Width 80 mm

Features

Windows operating systems supported Yes
Mac operating systems supported Yes
Product colour Black

Ports & interfaces

Ethernet LAN No
Wi-Fi No
Thunderbolt technology No
USB version 3.2 Gen 1 (3.1 Gen 1)

Hard drive

HDD size 2.5"
HDD capacity 4 TB

Packaging data

Package width 105 mm
Package depth 40 mm
Package height 146 mm
Package weight 340 g
User guide Yes

Product information

At a glance

  • 4TB capacity for ample file storage
  • USB 3.0 for rapid data transfers
  • Lightweight design for easy portability

Note: This text was created with the help of AI.

Perfect for Everyone Who Needs Extra Storage

If you’re on the lookout for a reliable and spacious storage solution, the Seagate Expansion Portable 4TB (STKM4000400) is an absolute game-changer. This hard drive is ideal for students, professionals, gamers, and anyone who needs to save their precious files, photos, and videos without cluttering their devices. With its sleek design and robust performance, it’s designed to meet the needs of all users, making it one of the best choices among External Hard Drives available today.

Advantages and Features that Stand Out

The Seagate Expansion Portable 4TB offers a wealth of features that make it a must-have. For starters, it provides an impressive **4TB of storage**, ensuring that you can store thousands of photos, videos, and documents without a hitch. It comes equipped with a **USB 3.0 interface**, allowing for super-fast data transfer rates, which means you can quickly move large files in mere moments. The plug-and-play setup means you’ll be up and running within seconds—simply connect it to your computer, and you're good to go! Plus, it’s compatible with both Windows and Mac systems, giving you versatility regardless of your device.

Sleek Design Meets Durability

Designed with portability in mind, the Seagate Expansion Portable 4TB is both compact and lightweight, making it perfect for on-the-go lifestyles. Its **matte black finish** not only looks stylish but also helps resist fingerprints and scratches, keeping it looking pristine. The drive's sleek profile ensures it fits easily into bags or pockets, so you can take your files wherever you go. The robust build also means you can trust it to protect your data, no matter where life takes you.

Unmatched Reliability and Performance

What sets the Seagate Expansion Portable 4TB apart is its **reliability and performance**. It’s designed to work silently while delivering top-notch efficiency, so you can focus on your tasks without distractions. With a warranty backing its performance, you can rest assured that your data is in safe hands. Whether you're backing up important documents or expanding your gaming library, this hard drive really delivers. Enjoy the peace of mind that comes with knowing your valuable data is securely stored and easily accessible whenever you need it!

Note: This text was created with the help of AI.

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3 Variants from £64.99

Seagate Expansion 4TB Mobile External Hard Drive in Black - USB3.0 PC MAC BNIB

Cheapest offer

Compatible With: Laptop, PC, Mac / USB Specification: USB 3.0 / Colour: Black / Form Factor: 2.5 in / Type: Portable External HDD / GTIN (EAN):: 3660619040254 / Drive Type(s) Supported: External SSD, HDD + SSD, HDD / Manufacturer Warranty: 1 Year / Model: Seagate STKM4000400 / Features: Cloud Storage, Password Protection, PlayStation 3 Compatible, PlayStation 4 Compatible, USB-Powered, USB Port, Shockproof / Storage Capacity: 4 TB / Manufacture: SEAGATE / Interface: USB / Country of Origin: China / Product Line: Expansion
£104.92
Will usually delivered within 2 - 3 working days of receiving cleared payment.
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