Rank #4 in Best 4TB External Hard Drive 2026: 9 Ranked, Specs Compared
Seagate Portable 4TB External Hard Drive (STGX4000400)
- Rating
- 4.5
- Ratings
- 265,604
- Rank
- #4
Price and rating as shown on Amazon when we collected them. Both change.
The Seagate 4TB Portable Hard Drive (STGX4000400) is the drive at number four in this guide. It is a bus-powered USB 3.0 portable marketed as an Amazon Exclusive, priced at £143.16, which puts it in the upper middle of the nine drives here - the range across the group runs from £89.91 to £169.94. Its 4.5 rating is drawn from 265,604 ratings, the largest review base in the guide.
What earns it a page of its own is how little of its own spec sheet agrees with itself. The same listing gives an 18-inch hard disk form factor for a drive it also calls portable, weighing 260 g and measuring 11.7 x 8 x 2 cm; 18 inches is roughly 46 cm. It also gives cache memory as 4 TB, which is the entire capacity of the drive, and quotes Read Speed as 120 Megabytes Per Second while the Data Transfer Rate field says 120 Megabits Per Second - the same number in two units eight times apart. Everything on this page comes from the Amazon listing and the customer reviews attached to it, not from testing we have carried out.
How those 265,604 ratings break down
An average hides its own shape. This is the spread behind the 4.5 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £143.16 |
|---|---|
| Rating | 4.5 out of 5, from 265,604 ratings |
| Stated capacity | 4 TB (given under both Digital Storage Capacity and Hard-Drive Size) |
| Interface | USB 3.0, backwards compatible with USB 2.0 |
| Hard Disk Form Factor (as listed) | 18 Inches |
| Cache Memory Installed Size (as listed) | 4 TB |
| Read Speed / Data Transfer Rate (as listed) | 120 Megabytes Per Second / 120 Megabits Per Second |
| Item Weight and Dimensions | 260 g; 11.7 x 8 x 2 centimetres |
What it is up against
The rivals it was ranked against in Best 4TB External Hard Drive 2026: 9 Ranked, Specs Compared.
Questions people ask
How much does the Seagate 4TB Portable Hard Drive cost?
The Seagate STGX4000400 listing gives £143.16, against a range of £89.91 to £169.94 across the nine 4TB drives in this guide.
What capacity does the Seagate STGX4000400 have?
4 TB. The listing states it twice, once under Digital Storage Capacity and again under Hard-Drive Size.
Does the Seagate listing agree on how big the drive is?
Not entirely. The Hard Disk Form Factor field says 18 Inches, while the same listing gives item dimensions of 11.7 x 8 x 2 centimetres and a weight of 260 g (as listed).
Does the Seagate 4TB Portable work with games consoles?
The listing says it is compatible with PC, notebook, Xbox and PS4 consoles, and names Sony PlayStation 4 as the compatible console model. One reviewer also reports formatting it for an Xbox Series console.
What transfer speed does the Seagate listing quote?
Two figures. Read Speed is given as 120 Megabytes Per Second and Data Transfer Rate as 120 Megabits Per Second - the same number in units eight times apart.
Is the Seagate 4TB Portable Hard Drive tested by you?
No. Every figure on this page is taken from the Amazon listing and the customer reviews on it. We have not run our own speed or capacity tests.
Comments
Reader comments are not checked against the manufacturer's claims above.
No comments yet
Be the first to add something we missed — a price change, a spec that turned out wrong, or how one of these held up.
Leave a comment
No account needed. Own one of these? Tell other readers how it actually performed.