# Seagate Portable Drive 1TB, Dark Grey (STGX1000400)

Source: https://www.ranked10.co.uk/tech/best-1tb-external-hard-drives/seagate-portable-drive-1tb
Ranked #3 in "Best 1TB External Hard Drive 2026: 10 Ranked, and the 625 MB/s Myth": https://www.ranked10.co.uk/tech/best-1tb-external-hard-drives

- Price: £86.99 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.5 from 265,605 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B07CRG7BBH?tag=ranked10-21

The Seagate Portable Drive 1TB is a plug-and-play USB 3.0 external hard drive in dark grey, listed at £86.99 with a 4.5 out of 5 rating from 265,605 ratings. It comes third in this guide, and it is the entry that shows what a plausible figure looks like: the listing gives a read speed of 120 MB/s, the kind of number a spinning disk actually produces, where other drives in this guide quote the 5 Gbps USB cable's own 625 MB/s ceiling as if it were drive speed.

The same spec sheet then undercuts itself. It quotes a data transfer rate of 20 Gigabits per second — that is 2,500 MB/s, four times the 5 Gbps the included USB 3.0 cable can carry and roughly twenty times the 120 MB/s the listing itself gives for read speed. The form factor fields disagree with each other as well: one says 3.5-inch, another says 18 Inches, while the item is described as a portable drive weighing 190 g. Every figure on this page comes from Seagate's Amazon listing, not from any testing we have carried out.

## Specification

| Field | Value |
|---|---|
| Price | £86.99 |
| Rating | 4.5 out of 5 from 265,605 ratings |
| Capacity | 1 TB |
| Interface | USB 3.0, backwards compatible with USB 2.0 |
| Read speed (as listed) | 120 MB/s |
| Media speed (as listed) | 120 megabytes per second |
| Data transfer rate (as listed) | 20 Gigabits per second |
| Form factor (as listed) | 3.5-inch; the same listing also lists 18 Inches |

## Questions people ask

**Is the Seagate Portable Drive 1TB fast?**

Seagate lists a read speed of 120 MB/s and repeats the same figure as media speed. That is a number a spinning disk can reach; the same listing also claims a data transfer rate of 20 Gigabits per second, which is 2,500 MB/s.

**What is the data transfer rate of the Seagate Portable Drive 1TB?**

The listing states 20 Gigabits per second. That is 2,500 MB/s — four times the 5 Gbps ceiling of the USB 3.0 cable included in the box, and about twenty times the 120 MB/s the listing gives as read speed.

**Does the Seagate Portable Drive 1TB work with a Mac?**

Seagate says it is designed to work with Windows or Mac computers, and lists Mac compatibility as reformat compatible.

**Do I need to install software to use it?**

No. Seagate says the drive is automatically detected when connected, with no software required, and describes it as plug-and-play with the included 46 cm USB 3.0 cable.

**What is covered by the warranty?**

The listing includes a two-year limited warranty and two-year rescue data recovery services.

**What form factor is the Seagate Portable Drive 1TB?**

The spec fields disagree. One lists 3.5-inch, another lists 18 Inches, while the item is described as a portable drive weighing 190 g and measuring 11.7 x 8 x 1.5 cm.