Enabling USB 3.0 in already existing Virtualbox VMs
Just a quick note on how to get USB 3.0 in Virtualbox for VMs that were created with USB 1.1 support only. First, download VirtualBox Extension Pack from here. Install it. Then quit Virtualbox completely. Go to your directory that contains your virtual machine and edit .vbox file. Replace the whole <USBController> section with the following:
That's it, let me know if it works for you !