LaCie Porsche Design Slim P'9223 500 GB Hard Drive 9000304 Ultra-Fast USB 3.0 performance, Slim, solid aluminum Transfer files, back up a computer, or stream content significantly faster than with USB 2.0, Built for speed, Up to 100MB/s Built for Mac; works flawlessly with Time Machine, USB 2.0 backwards compatible Solid aluminum casing surrounding the disk keeps data protected, Greater resilience to shock, vibration and extreme temperature Software Suite features: Public/Private to protect against unauthorized users, and Backup Assistant