USB 3.1 or 3.0


USB 3.1 or 3.0

This item, WD My Book 6TB USB 3.1 (Gen 1 Type-A) 3.5" Desktop External Hard Drive - Black:

At the top of the page and in the specs section shows USB 3.1, the documents available to download all show USB 3.0. Which one is correct and why the difference?

Best Answers


  • crosstalk

    Thanks TSMikeW, that was really insightful. So essentially the speed of the port in this case makes no difference, whether it's Gen 1 or 2, since the drive will never be able to take advantage of that speed due to the write time limits, on this particular drive anyway.

  • PowerSpec_MikeW
    PowerSpec_MikeW PowerSpec Engineer
    5 Insightfuls First Anniversary First Comment 5 Awesomes


    That's correct. USB 3.0 speeds will far exceed an HDD. A SATA SSD could come cap it out. The faster drive is in the 550MB/s area. SATA 3.0 controllers are 6Gb/s or 750MB/s theoretical max.

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