I inherited a lot of USB flash drives and would like to find out what USB version they are (i.e. 2.0, 3.0 or maybe even older). How can I do that on Ubuntu?
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Check the color of the insulator strip in the connector.
A 2.0 device will have a black or white insulator. A 3.0 device will have a blue insulator and a 3.2 device is supposed to have a red insulator, but I've never seen a devices rated for 3.2 in the wild.
rbmorse
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1Is there no way to check this with software? – sababa Apr 28 '20 at 17:48