Silicon Power 2TB Armor A65M for Mac Military-grade Shockproof USB 3.0 2.5-inch External Hard Drive- HFS+ and Time Machine Supported, Gray (SP020TBPHD65MS3G) Easy plug-and-play use for Mac, supporting HFS+ and Time Machine Military-grade shockproof and IP67 dustproof/waterproof protection Advanced 3-layer protection mechanism designed for extra rugged and shock resistant Rugged rubber case and anti-slip surface design made to avoid scratches and slippery problems Cable storage design for simple cable carrying SuperSpeed USB 3.0 interface, backward compatible with USB 2.0 SP Widget free-download software for smarter data management, including data backup & restore, AES 256-bit encryption and cloud storage