Verbatim 500GB Store 'n' Go Combo FireWire 800 and USB 3.0 Portable External Hard Drive for Mac, Black 53042 SuperSpeed USB 3.0 delivers transfer speeds up to 10x faster than USB 2.0 FW800 provides the fastest FireWire connection available Backwardly-compatible with USB 2.0 ports Includes Verbatim's Green Button energy-saving software Green Button offers 3 sleep/suspend settings, saving power when the drive is not in use Features Verbatim's Formatter software, allowing users to easily format the drive to either FAT32 or HFS+, based on their own requirements. Includes 2-year limited warranty Time Machine Ready