The Seagate 2TB Portable Hard Drive is listed at $119.99 at Amazon, a 20 percent cut from its $149.99 list price. The more telling number sits one listing across, where the 4TB version of the same line sells for $159.99 and works out to a third less per terabyte.
The price is open to everyone. Amazon shows no Prime-exclusive price, no second tier for members and no limited-time deal badge, and Amazon.com itself holds the buy box rather than a marketplace reseller.
This is a mechanical drive, which is worth stating plainly. Seagate’s own FAQ says an external hard drive uses spinning disks while an SSD uses flash memory, and the STGX line is a 2.5-inch platter drive.
Seagate Portable 2TB specifications
| Specification | Product |
|---|---|
| Model number | STGX2000400 |
| Capacity | 2TB |
| Drive type | 2.5-inch mechanical hard disk |
| Interface | USB 3.0, 5Gb/s maximum bus rate |
| Power | USB bus powered, no wall adapter |
| Dimensions | 117 x 80 x 14.8 mm (reported) |
| Weight | 190 g (reported) |
| In the box | 18-inch USB 3.0 cable |
| Warranty | 1 year limited |
| Price | $119.99 |
Seagate says the drive runs entirely on USB power, so there is no wall adapter to carry. The company’s product page also confirms it works with PC, Mac and Chromebook machines.
What $119.99 buys per terabyte
At $119.99 the 2TB model costs $60.00 per terabyte. Two listings in Seagate’s own range complicate that figure.
| Drive | Price | Per terabyte | Buy box |
|---|---|---|---|
| Seagate Portable 2TB | $119.99 | $60.00 | Amazon.com |
| Seagate Portable 1TB | $119.99 | $119.99 | Amazon.com |
| Seagate Portable 4TB | $159.99 | $40.00 | Amazon.com |
| WD Elements Portable 4TB | $191.99 | $48.00 | Sales For You |
| SanDisk 2TB Extreme Portable SSD | $289.99 | $145.00 | Amazon.com |
The Seagate Portable 4TB at $159.99 is the stronger buy. Another $40.00 doubles the capacity, and Amazon lists it at a 16 percent cut from $189.99 with its own name on the buy box.
The 1TB model is the awkward one. It carries the same $119.99 price as the 2TB, which suggests the pricing on this line tracks the listing rather than the capacity.
The WD Elements Portable 4TB at $191.99 is a credible larger option at $48.00 per terabyte. However, its buy box is held by a marketplace seller called Sales For You, not by Amazon.
A portable SSD now costs more than twice as much
The usual advice is to check whether a portable SSD costs about the same. It does not, and the gap is wide.
The cheapest 2TB portable SSD that Amazon itself sells is the SanDisk 2TB Extreme Portable SSD at $289.99. That is $145.00 per terabyte, against $60.00 for the Seagate, and it is 2.4 times the price for the same capacity.
Samsung’s T7 Portable SSD in 2TB is listed at $394.00 and the T7 Shield at $517.02. A search of Amazon sorted by price found no 2TB portable SSD below $177.99, and that one came from an unfamiliar brand.
Flash pricing explains the distance. Digital Citizen has tracked how SSD prices have surged as AI demand pushes drives above previous lows, and Phison has warned that NAND supply could stay tight for four years.
The same squeeze shows up in internal drives. The Samsung 990 PRO 2TB recently landed at $389.99, which is more than three times the price of this portable Seagate.
So mechanical storage is the cheap option at the moment. That is the honest case for this drive, rather than the 20 percent badge.
What the listing does not say
Amazon’s own specification table is unreliable here. It gives the form factor as 3.5 inches, which cannot be right for a 190 g enclosure that runs on bus power.
The same table lists the cache as 2 TB, which is the capacity rather than the cache. It also claims a 7200 rpm rotational speed and a 1 Gb/s transfer rate, neither of which matches Seagate’s published material.
Seagate does not publish a rotational speed, a cache size or a real-world transfer figure for this model. The 120 MB/s read speed on the listing is an Amazon catalog field, not a Seagate specification.
Mac owners should plan for a reformat. Seagate says the drive may need reformatting to work with both Windows and Mac, and the listing does not mention that reformatting erases the drive.
Two other gaps are worth noting. The 2TB title promises a 1-year warranty but no Rescue data recovery service, while the 1TB and 4TB listings both advertise a 1-year Rescue service in their titles.
The STGX line is also old. Seagate’s own store now shows the drive as no longer in stock, with no price attached to it at all.
Amazon publishes no end date for the $119.99 price and shows no deal badge, so the figure may simply be the standing price. Shoppers weighing storage types can also read about thinner portable SSD designs, though all prices here are as of October 5, 2026 and can change.
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