A mechanism, a bridge and a case, and buyers compare the wrong one of the three · review
Seagate Portable 4 TB external drive review
A 4 TB portable drive that powers from the USB port, ships with an 18-inch USB 3.0 cable and includes a year of Seagate’s Rescue data recovery, at $189.99 on Amazon.com on October 28, 2026.
Amazon.com listed it on October 26, 2026, but no current offer passed our price check, so no price is quoted. The Amazon.com page exists, but nobody was selling the unit; a listing in that state is often a third-party import.
Models on this shelf that Amazon.com did sell on that date:
A 4 TB portable hard drive from Seagate’s Portable range (STGX4000400) that draws its power from the computer’s USB port, with an 18-inch USB 3.0 cable in the box. Seagate states it works with Windows and Mac without software: plug it in and drag files across. The Amazon.com listing adds a year of Seagate’s Rescue data recovery service. The same listing also sells 1, 2 and 5 TB versions.
Capacity, and the 3.6 TB surprise
Four terabytes in the maker’s decimal unit appear as about 3.6 TB on a computer, because operating systems count in powers of 1,024. That is normal and true of every drive. For scale: 4 TB holds roughly a million phone photos, or 40 to 80 large modern games.
A hard drive, not an SSD
Inside is a spinning 2.5-inch disk. It is far cheaper per terabyte than a portable SSD, and slower: Seagate publishes no transfer rate, and drives of this kind typically sustain around 100 to 130 MB/s on large files over USB 3.0. It is also more sensitive to knocks while running. Fine for backups, photo archives and a console games library; not the drive for editing video directly from it.
The connector
The drive end uses a USB 3.0 Micro-B socket, the wide flat plug common on portable drives of this generation, and the cable ends in a standard USB-A plug. A computer with only USB-C ports needs a USB-C to Micro-B cable or an adapter. If you want USB-C on the drive itself, the LaCie Rugged 4 TB at $209.99 has it.
Prices quoted in this text were read on October 28, 2026. The live price is at the top of the page.
Where it holds up, and where it stops
Strengths
Bus-powered: one cable, no power adapter, which is what a laptop drive should be
A year of Seagate’s Rescue data recovery included, worth having on a drive that travels
Sold in 1, 2, 4 and 5 TB under the same listing, so the size can be matched to the need
Compromises
A spinning hard drive: slower than an SSD, and it dislikes being dropped while running
Micro-B connector on the drive, older and more fragile than USB-C
No transfer rate published, only the USB generation
Specifications
Capacity
4 TB, in the maker’s decimal unit; a computer shows about 3.6 TB
Format
2.5-inch portable hard drive, powered from the USB port
Interface
USB 3.0, backward compatible with USB 2.0
Cable
18 in (46 cm) USB 3.0 cable included, as listed
Connector on the drive
USB 3.0 Micro-B; the cable ends in a USB-A plug at the computer
Size and weight
About 4.6 × 3.1 × 0.6 in (117 × 80 × 15 mm), as listed on Amazon.com
Compatibility
Windows and Mac, stated; macOS needs reformatting for full read-write use
Data recovery
Rescue data recovery service for one year, in the Amazon.com title
Amazon reference
B07CRGSR16
EAN
0763649127315
On Amazon.com
Amazon.com listed it on October 26, 2026, but no current offer passed our price check, so no price is quoted.
The questions that come up before an order
Why does my 4 TB drive show only 3.6 TB?
Because makers count a terabyte as 1,000,000,000,000 bytes and computers count in powers of 1,024. Four decimal terabytes come to about 3.6 binary terabytes. Nothing is missing.
Does it work with a Mac?
Yes, Seagate states Windows and Mac compatibility. It ships formatted for Windows, which a Mac can read but not write to; for Time Machine or full macOS use, reformat it in Disk Utility, which erases it.
Does it need a power adapter?
No. It draws its power from the USB port through the single cable. On some older laptops and front-panel ports, connect it directly rather than through an unpowered hub.
Can I use it with a PlayStation or Xbox?
Generally yes: current consoles accept USB 3.0 external drives of this size for storing games. Check your console’s requirements, which set a minimum and maximum capacity and, on some models, only allow older-generation games to run from an external hard drive.
Our score
7.6/ 10
A straightforward 4 TB portable drive: bus-powered, cable included, a year of data recovery, Windows and Mac. It is a hard drive, not an SSD, so buy it for capacity and backups, not for speed.
Against the rest of the network and storage gear
This network and storage gear share the category and the price bracket. Only what each one states is shown; an incomplete column would mislead.
Model
Price
Capacity
Seagate Portable 4 TB external drive
$190
4 TB, in the maker’s decimal unit; a computer shows about 3.6 TB
What separates the models, in network and storage gear
If price decides: Avolusion PRO-T5, 4 TB, 2-year warranty, at $159.
The buyer this one serves, among network and storage gear
A laptop or a game console that has run out of room, or a second backup copy, where 4 TB at a moderate price matters more than speed.
What this one costs among network and storage gear
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on October 28, 2026.
What buyers actually choose
Amazon reports what buyers took in the month before this page was last checked: at least 6,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Sources
Specifications: the manufacturer sheet for network and storage gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
4 TB · format not published · USB 3.0 · Windows only · connector not published · power source not published · refurbished 7200 rpm enterprise mechanism in a new case · 1,361 g (48 oz) · two-year warranty
The only drive on this shelf that names the grade of the mechanism inside it — a refurbished 7200 rpm enterprise drive in a new case — on a listing whose description is partly copied from another model.
Best for: A buyer who would rather know the mechanism is enterprise than that it is new
1 TB · 2.5-inch portable · refurbished drive in a new enclosure, tested in Vechta, Germany · USB 3.2 Gen 1 (5 Gbps) · 85 MB/s read, 75 MB/s write · 5 × 3 × 0.5 in
A refurbished 1 TB portable drive, tested by Intenso in Germany and fitted in a new enclosure, rated 85 MB/s read and 75 MB/s write over USB 3.2 Gen 1, at $82.58. That is about $83 per terabyte.
Best for: A small, bus-powered drive for a second copy of documents and photos that fit in 1 TB.
4 TB · portable · USB-C · USB 3.2 Gen 1 and Gen 2 and Thunderbolt 3 listed · shock, water and pressure resistance claimed · three-year warranty · one cable in, one out
A four-terabyte portable drive that lists five interface standards it works with, names the cable in the box and the cable that is not, and publishes a three-year warranty.
Best for: A drive that leaves the desk and goes into a bag on a site or a shoot, where the protective claims and the published warranty are the reason to pay more.
