With USB 2.0, eSATA and FireWire 400, it offers universal connectivity with your PC, Mac or Linux-based computer. Connect via USB 2.0 to easily share files with friends and family. For speed-demanding applications, eSATA offers a fast transfer rate of up to 80MB/s. With two FireWire ports, it can connect to your computer and to another device like a camcorder or camera. Setup is nearly effortless; it's plug & play and offers automatic formatting with LaCie Setup Assistant. LaCie '1-Click' Backup Software (PC and Mac) is also included for quickly saving important files in one click.