Any OTG device should be able to work; just be aware that the HVX doesn't supply any "bus power" so you'll either need a battery-powered hard disk enclosure, or you'll have to plug it into a wall socket.
Okay, great . My other questions was about the usb to firewire cable will that work. Also hat advantage does firewire have over the usb in regards to the O-T-G drive off loading