Seagate Fast SSD USB-C storage

Seagate Fast SSD
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The Seagate Fast SSD is a range of portable USB-C external SSD ranging in capacity from 250GB to 2TB. It is as fast as any external SATA/600 drive can be.

The Seagate Fast SSD is a direct competitor for external SSD drives like Samsung T5, Toshiba X10 and WD My Passport SSD. All of these use a SATA/600 interface over USB so speed is limited to what the drive interface can support, e.g. a maximum of 600MBps.

Review: Seagate Fast SSD (Website here)

The test was conducted using Lenovo’s 920Yoga (our pick of the 4K, 2-in-1 notebooks this year) with 2 x 40Gbps (5,000MB/s) Thunderbolt 3 ports and a USB-A 3.0, 5Gbps (625MB/s) port.

Seagate Fast SSD

Being the latest cab off the rank the Seagate Fast SSD performs very well.

Using the Thunderbolt 3 (USB-C mode 5Gbps) Crystal Disk Mark recorded 560/497MBps sequential read/write speeds. Seagate advertise 540/500 –nice to see conservative figures for a change. It also did quite well on larger files managing 19/30MB/s on 1GB files.

Seagate Fast SSD

Using the USB-A, 5Gbps port, in theory, should have been just as fast as USB-C over Thunderbolt. It wasn’t but don’t blame the drive. USB-A is half-duplex meaning it is like a one-lane road that stops when traffic is coming the other way.

Seagate Fast SSD

Sequential read/write dropped to 41/40MB/s and larger 256MB, 512MB and 1GB files dropped off enormously. If you buy this drive make sure you have USB-C 3.1 Gen1 (or later)ports if you need is for fast transfer.


  • Being SSD,it is shock resistant
  • Comes with 45cm USB-C cable and USB-A – use the former for advertised speed
  • Folder Syncing software and Seagate Toolkit backup and mirroring software
  • PC and Mac compatible (may require a format touse for Time Machine)
  • Small – 94 x 79 x 9mm x 82g
  • No IP rating so keep it dry

Prices (courtesy Harris Technology).

  • 250GB $179
  • 500GB $259
  • 1TB $569
  • 2TB TBA

GadgetGuy’s take. Seagate Fast SSD external backup

Good price and performance from a respected company. Our only advice is to use it with USB-C ports only.

If you need more speed, then look at Thunderbolt 3 only drives like the  Samsung X5 that can achieve 2815/2097MBps on the sequential read/write test using the Yoga 920.

Value for money
Ease of Use
Reader Rating0 Votes
Small, pocektable and fast
Use with USB-C 3.1 Gen 1 for maximum performance