Elgato Thunderbolt Drive + (512 GB) Lightning-fast: transfer speeds up to 420 MB/s Portable: bus-powered, no power supply needed Versatile: Thunderbolt, USB 3.0 and USB 2.0 compatible Reliable: no moving parts and server-grade Plextor SSD technology Silent: fan-less design and inaudible Solid State Drive Durable: dust and water protected metal enclosure