bro USB 3.0 is backward compatible, means you can use a USB 2.0 device on USB 3.0 port but with only usb 2.0 speed.... usb3 has 5 extra pins than the usb2 connectors but doesnt mean you cannot connect a usb2 device to a usb3 port....

tup:tup
i am really surprised to hear that you cannot plug-in usb-2 devices to usb-3 ports... :shy:shy:shy