Go to System-Administration-Users and Groups - then “Manage Groups”, then:
1 double-click “vboxusers” then check/enable your account in there, OK.
2 Click Add enter group name: usb, group id: 1001, add your account in there too, OK.
3 Restart your computer.
或者输入命令：
sudo adduser USER vboxusers
sudo groupadd usb
sudo adduser USER usb
