LaCie Rugged RAID Thunderbolt 4TB External Hard Drive with 7-Port USB Hub Bundle 4TB ThunderboltTM and USB 3.0 for speeds of up to 240 MB/s Internal Storage Media: 2 x hard drives Bus powered via Thunderbolt for mobile workflows Hardware RAID 0/1 flexibility for speed or security Shock, dust, and water resistance for all-terrain use