<External Interface>
All the settings related to the USB are listed with descriptions.
<USB Settings>
Specify whether to enable or disable use of the USB port or a USB memory device.
<Use as USB Device>
Enable or disable the USB port that is used for connecting the machine to a computer. Restricting the USB Connection with a Computer
<Use USB Storage Device>
Specify whether to use a USB memory device.
<Menu> 
<Preferences> <External Interface> <USB Settings> Select <Off> or <On> in <Use USB Storage Device> <Apply> Restart the machine
<Preferences> <External Interface> <USB Settings> Select <Off> or <On> in <Use USB Storage Device> <Apply> Restart the machine