# Seagate One Touch 4TB Portable Hard Drive

Source: https://www.ranked10.co.uk/tech/best-4tb-external-hard-drives/seagate-one-touch-4tb
Ranked #1 in "Best 4TB External Hard Drive 2026: 9 Ranked, Specs Compared": https://www.ranked10.co.uk/tech/best-4tb-external-hard-drives

- Price: £155.21 (checked on Amazon UK on 2026-09-18)
- Amazon rating: 4.6 from 3,874 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B094QZDWHB?tag=ranked10-21

The Seagate One Touch 4TB is the portable drive that takes the top spot in this guide, and at £155.21 it is one of the dearest of the nine — the same 4TB of space is sold here for anything between £89.91 and £169.94. It is a 2.5-inch brushed metal portable on USB 3.0, spinning at 5400 RPM, weighing 268 g, and it carries a 4.6 rating from 3,874 reviews.

The numbers on this listing do not all agree with one another. Cache memory is given as 4 TB, which is the drive's own storage capacity, so the two fields carry the same figure. The data transfer rate is quoted at 480 Megabits Per Second — the USB 2.0 ceiling — on a drive whose hard disk interface is listed as USB 3.0. Read speed is given as 120 Megabytes Per Second, and a separate 'media speed' field reads '100 megabytes per second ou plus', which looks pasted in from another language. Even the product's own customer reviews are not all about this capacity: the top one describes a 5TB One Touch. Everything on this page is taken from the Amazon listing, not from any test of our own.

## Specification

| Field | Value |
|---|---|
| Price | £155.21 |
| Rating | 4.6 out of 5 from 3,874 ratings |
| Digital storage capacity | 4 TB |
| Cache memory installed size (as listed) | 4 TB — the same figure as the drive's own capacity |
| Data transfer rate (as listed) | 480 Megabits Per Second, the USB 2.0 ceiling, on a USB 3.0 interface |
| Read speed | 120 Megabytes Per Second |
| Hard disk rotational speed | 5400 RPM |
| Form factor (as listed) | 'Portable.' with a full stop; listed separately as 2.5 Inches |

## Questions people ask

**How much does the Seagate One Touch 4TB cost?**

The listing price is £155.21, near the top of the £89.91 to £169.94 range the nine 4TB drives in this guide sell for.

**Does the Seagate One Touch need reformatting for a Mac?**

The listing describes it as an on-the-go USB drive for Windows and Mac, and says reformatting may be required for use with Time Machine.

**What read speed does the Seagate One Touch 4TB list?**

The listing gives a read speed of 120 Megabytes Per Second from a 5400 RPM mechanism, with a separate media speed field of '100 megabytes per second ou plus'.

**Is 4 TB the cache size of the Seagate One Touch?**

No. 4 TB is the drive's storage capacity. The listing separately gives Cache Memory Installed Size as 4 TB, so both fields carry the same number.

**What transfer rate does the Seagate One Touch 4TB quote?**

480 Megabits Per Second, while its hard disk interface is listed as USB 3.0 and its hardware connectivity as USB, USB 2.0 and USB 3.0.

**What comes with the Seagate One Touch 4TB?**

A two-year limited warranty, a two-year Rescue Data Recovery Service plan, one year of Mylio Create and four months of Adobe Creative Cloud Photography, redeemable within a year of registration.