does usb 3.0 work on 2.0

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does usb 3.0 work on usb 2.0

does a usb 3.0 work on a 2.0 port

does usb 3.0 work on 2.0, does usb 3.0 work on usb 2.0, does a usb 3.0 work on a 2.0 port

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