Nicolas Hanson

USB3 transfer speed from internal disk

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(edited)

What is the normal transfer speed on USB 3 from an external disk to an internal disk on a Windows PC? I reach 140 MB/s maximum

Edited by Nicolas Hanson

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Even with SSDs, you may well find you don't get the maximum speeds you expect from USB 3.

There are a number of flavours of USB 3, for example 3.0, 3.1 and 3.1 Gen 2 - all these can effect your transfer rates depending on the drive technology and the compatibility of the interface. 

As an example I have a HP Zbook studio laptop, which has USB 3 and Thunderbolt 3.

When I connect a Samsung SSD T5 (which has a type C connector) to the USB3 port, I'm getting around 450MB/sec read/write.

When I connect the same drive to the thunderbolt 3 port I get around 550MB/sec, which is about the limit of the published drive's speed.

As a comparison, the internal drive, (which is a M.2 NVMe SSD) is testing 1,600MB/sec write and 3,100MB/sec read. So NVMe is definitely the way to go. I do have a spare M.2 socket inside my laptop, so this is an upgrade I may consider in the future.

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