Apricorn Aegis Padlock Pro 750 GB USB 2.0 and eSATA 256-Bit AES Encrypted Portable External Hard Drive A25-PLe256-750 (Black) Secure PIN Access,Real-time 256-bit Military Grade AES Hardware Encryption tilizes FIPS PUB 197 Validated Encryption Algorithm Ultra-fast eSATA and USB interface for data transfer rates of up to 90MB/sec Allows up to 10 PIN Passkeys, Wear resistant key pad Software free design, Compatible with any OS - Windows, Mac & Linux