Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive
Brand Seagate
From
£146.99
Free delivery
2 offers at 2 retailers
Listed since 13 April 2026
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Description
Specifications
| HDD capacity | 4 TB |
| HDD size | 3.5" |
| Thunderbolt technology | No |
| Wi-Fi | No |
| Ethernet LAN | No |
| USB version | 3.2 Gen 1 (3.1 Gen 1) |
| Product colour | Black |
| Windows operating systems supported | Windows 10 |
| Mac operating systems supported | Mac OS X 10.12 Sierra, Mac OS X 10.13 High Sierra, Mac OS X 10.14 Mojave, Mac OS X 10.15 Catalina, Mac OS X 10.15.3 Catalina |
| Bus powered | No |
| External power adapter | Yes |
| Width | 41.9 mm |
| Depth | 125 mm |
| Height | 178.8 mm |
| Weight | 1.18 kg |
| Cables included | USB |
| User guide | Yes |
| Package width | 212 mm |
| Package depth | 77 mm |
| Package height | 218 mm |
| Package weight | 1.34 kg |
| Harmonized System (HS) code | 84717050 |
Full specifications
| Marque | Seagate |
| Référence fabricant | stkp4000400 |
| EAN | 3660619040407 |
Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive: complete technical analysis for 2026
Choosing the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive means opting for the expertise of Seagate in the Périphériques informatiques category. Its price starting from £146.99 makes it a serious option on the market. Buyers interested in this brand also look at the Seagate SkyHawk AI 10TB Surveillance Drive - ST10000VE001 | 7200 RPM, 256MB Cache, Up to 64 HD Cameras + 16 AI Streams to complete their comparison. On Compiral, all displayed prices are updated regularly and retailers are selected for their reliability and quality of customer service.
Who is this Périphériques informatiques for?
The Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive benefits from the expertise of Seagate in this category. Its design meets current market standards and satisfies even the most demanding users in their everyday activities. The brand's reliability translates into positive feedback from regular buyers, who particularly appreciate the consistency between the promises of the product sheet and the real-world experience. For the Périphériques informatiques category, this is an option we recommend without hesitation.
For intensive or occasional use
The Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive adapts to different levels of use in the Périphériques informatiques category. Whether you use it intensively every day or more occasionally, this Seagate product offers appreciated versatility. Regular users value its reliability over time, while occasional users appreciate how easy it is to pick up without any special training. For even more demanding use, also check the Seagate SkyHawk AI 10TB Surveillance Drive - ST10000VE001 | 7200 RPM, 256MB Cache, Up to 64 HD Cameras + 16 AI Streams.
Against the competition
In the Périphériques informatiques market, the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive is well positioned thanks to its price from £146.99 and the strength of Seagate. Our comparison tool lets you verify in real time whether this positioning still holds against other available offers.
Market price ranges in 2026
| Range | Indicative price |
|---|---|
| Entry-level | Under 2280 £ |
| Mid-range | 2280 £ to 5310 £ |
| High-end | Over 5310 £ |
The best times to buy the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive at a lower price are Black Friday in November, the January sales and the summer sales in July. Our price history lets you judge whether the current price is a genuine bargain or whether it is worth waiting a few weeks. Outside these periods, flash promotions remain frequent among Compiral's partner retailers.
Frequently asked questions about Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive
How does the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive compare to competitors in the Périphériques informatiques category?
In the Périphériques informatiques category, the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive occupies a specific market segment. Compared to other available models, it stands out mainly through the balance between its features and its price. To compare objectively, consult the detailed spec sheet on this page and compare specifications with other similar products listed on our comparison tool.
Is the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive suitable for beginners?
Yes, the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive is generally appreciated by both beginners and regular users of the Périphériques informatiques category. It is quick to set up and Seagate usually provides clear documentation. If you are new to this product category, consult the spec sheet on this page to identify the key criteria to check before making your choice.
Is there a refurbished version of the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive?
Refurbished versions of the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive may be available from certain Compiral partner retailers. These refurbished products allow you to save between 20% and 40% compared to the new price while still benefiting from a warranty. Check availability in our offers table and review the warranty conditions offered by the retailer.
When do prices for the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive drop during the year?
Prices for the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive typically drop during Black Friday (November), the January sales and the summer sales (July). Promotional deals are also common around Cyber Monday and the holiday season. Our price history lets you spot trends and assess whether a price drop is likely soon in the Périphériques informatiques category.
Is delivery free for the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive at all retailers?
Free delivery is not guaranteed for the Seagate Expansion 4TB 3.5" 5400RPM USB 3.0 External Hard Drive at every retailer. Some include it in their price, others charge separately. On Compiral, use the free delivery filter to display only offers with free postage. The total price shown in our table always includes delivery costs for a true cost comparison.
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