Virtualbox Stuff
If you want to have the full experience of your VirtualBox, follow these steps.
This goes into your Linux host system
sudo adduser $USER vboxusers
After that, you have to log out/login or reboot the system
This goes into your Linux guest system And also install the guest additions into your guest system
sudo usermod -a -G vboxsf "$USER"
Don't forget to install the extension pack into the host system. And control that your extensions pack version is compatible with your installed version.
VBoxManage list usbhost
If you see here an out, everything is alright
Source: https://askubuntu.com/questions/377778/how-to-add-users-to-vboxusers-to-enable-usb-usage