Ud-3900 laptop USB 2.0

I bought ud-3900 and thought it will work for my old laptop with USB 2.0 only. It doesn’t seem like it is working or I am missing something. I want to confirm it before I return it.


Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.

The dock is USB 2.0 backwards compatible. Have you already installed the drivers for the dock from our website? Also, if you can tell us what laptop you have that would be quite helpful!

If not already done, here’s a link to the drivers:

If you have already installed the drivers, we have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the dock into your computer, then go to this page and follow the instructions there:


Please don’t hesitate to let us know of other questions.

Thanks again for contacting Plugable support and best wishes!

Joshua Henry

Senior Engineer
Plugable Technologies

http://plugable.com | http://performance.plugable.com/

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