If you want maximum security and peace-of-mind for your footage on the road, then there's only one drive to use: ioSafe's Rugged Portable Hard Drive.
Physically, the thing takes unbelievable abuse. I had a test unit to work with, and dropped it from 9 feet multiple times, submerged it in water for hours, and parked a Toyota SUV on top of it. Despite all that, the drive continued to work perfectly.
PLUS, the drive comes with an unbelievable 1-year data recovery service, for free.
Check out my CreativeCOW review right here.