The Armor A85 is another rugged drive for people frequently on-the-go from Silicon Power which does offer shock-proof, water-proof and dust-proof protection of a military-grade. While the product we have got for review does feature 500GB capacity (on a Seagate ST500LM012 5400RPM drive), the manufacturer is also selling 1TB, 2TB and even 4TB versions of the product, for people which need to perform large backups.