The storejet usb 30 series external hard drives combine the superior performance of usb 30 vast storage space up to 2tb and a three stage shock protection system that meets us military drop test standards with these amazing features packed into simple yet stylish designs what else can you ask for one plus one is greater than two the storejet 25m3 combines the shock resistant qualities of transcend39s award winning rugged storejet m series with the superspeed 5gbs interface bandwidth of usb 30