The lacie 24tb 4big quadra usb 30 external hard drive is built for the professionals who require fast transfer speeds and ultimate security the 4big quadra is an external storage device with raid 5 usb 30 connectivity and also features an efficient and ultra quiet cooling system to ensure maximum reliability the hardware raid controller ensures sustained performance and prevents dropped frames more than twice as fast as firewire 800 up to six times the speed of usb 20 the lacie 4big qu