User who need to store large amounts of protected data have a further option starting today, as Apricorn adds a 750-gigabyte external USB/eSATA laptop drive with built-in 128- or 256-bit AES encryption to its Aegis Padlock lineup. As seen in our previous review of the 640GB size, the drives use a variable time circuit, encrypted PINs and keys and even offer a brute-force self-destruct feature if it senses it is being systematically attacked.