- Download and install the same version of the extensions as the Virtual box.
- Type Sudo usermod -aG vboxusers yourUserName in a terminal.
- Log off and log in again.
- Open the VM control panel and tick under USB to use USB 2.0.
- Plug the USB device. The OS will grab the device. Eject it and the Virtual box will see it is now free and capture it for itself.
I have tried that with various USB devices; some where found straight away (like an iPod for example), others never did. It's a hit a miss I guess.