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Question

Which one of the USB ports supports USB 3.0?

How can I tell which port on my ThinkPad T420s is a USB 3.0?

Answer

Originally on earlier systems with USB 3.0 the ports are identified by the blue insert.  See illustration below of a typical ThinkPad USB port configuration.

On later models the blue insert was replaced with a black insert and the following symbol to identify USB 3.0 ports;

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vegan-fanatic

most still use the blue color as it is a de facto standard

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