The Corsair Padlock USB 2.0 memory drive is one such device. While other products may boast some sort of software protection, the Corsair Padlock comes equipped with a simple numerical keypad right on the flash drive itself. Working much your PIN at an ATM, a certain number must be entered before the drive is unlocked and ready to use. In fact, if you plug a locked Corsair Padlock into an available USB port on your computer, it won’t even recognize it.