RB751U-2HnD USB port

Hi Guys

What are some applications of the USB port on this device please ?
http://routerboard.com/RB751U-2HnD

Thanks
Kimmy

OK, I see some information here

http://www.tnsolutions.ro/rb751g-2hnd-usb-disk-stores-2/

and also here

http://mybroadband.co.za/vb/showthread.php/400897-MikroTik-RouterBoard-and-USB-3G-Modems

Thanks.