Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black
Brand Seagate
From
£547.48
Free delivery
You save £18.51 (3%)
3 offers at 3 retailers
Listed since 7 April 2026
Compare prices
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Description
Specifications
| HDD capacity | 20 TB |
| HDD size | 3.5" |
| Wi-Fi | No |
| USB version | 3.2 Gen 1 (3.1 Gen 1) |
| Product colour | Black |
| Windows operating systems supported | Yes |
| Mac operating systems supported | Yes |
| Bus powered | No |
| External power adapter | Yes |
| Width | 41.9 mm |
| Depth | 125 mm |
| Height | 178.8 mm |
| Weight | 1.18 kg |
Full specifications
| Marque | Seagate |
| Référence fabricant | stkp20000400 |
| EAN | 8719706043700 |
Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black: complete technical analysis for 2026
The Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black meets the expectations of buyers who want a quality product without paying over the odds. Thanks to our comparison tool, find the best offer among all partner retailers listed on Compiral. The trust rating shown for each retailer helps you choose a reliable shop with clear return conditions and responsive customer service. If you are unsure, also check the Seagate Basic external hard drive 5 TB 2.5" 3.2 Gen 1 (3.1 Gen 1) Silver from the same brand. A good price comparison can save you between 10% and 30% on your purchase depending on the time of year and available retailers.
Who is this Informatique for?
The Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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 Informatique category, this is an option we recommend without hesitation.
For intensive or occasional use
The Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black adapts to different levels of use in the Informatique 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 Basic external hard drive 5 TB 2.5" 3.2 Gen 1 (3.1 Gen 1) Silver.
Against the competition
In the Informatique market, the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black is well positioned thanks to its price from £547.48 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 384300 £ |
| Mid-range | 384300 £ to 896710 £ |
| High-end | Over 896710 £ |
The best times to buy the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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 STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black
How does the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black compare to competitors in the Informatique category?
In the Informatique category, the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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 STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black suitable for beginners?
Yes, the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black is generally appreciated by both beginners and regular users of the Informatique 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 STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black?
Refurbished versions of the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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 STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black drop during the year?
Prices for the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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 Informatique category.
Is delivery free for the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black at all retailers?
Free delivery is not guaranteed for the Seagate Expansion STKP20000400 external hard drive 20 TB 3.5" 3.2 Gen 1 (3.1 Gen 1) Black 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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