how to restrict USB access?

[gs]

how to restrict USB access to keyboard, mouse and webcam/scanners and no
other type of devices allowed? of course Administrators are to be allowed to
use any USB devices

 

[Carey Frisch]

How can I prevent users from using USB removable disks (USB flash drives) by using Group Policy (GPO)?
http://www.petri.co.il/disable_usb_disks_with_gpo.htm