trying to build an external hard drive rack. What i did was take an old desktop power supply, jumped it , and used it to power 4 hard drives. Even installed a fan and an LED to remind me its on. i have an adaptor that plugs in to the data port and usb on the other end. Problem is i have to plug it into only one hard drive at a time. Is there a cable that will plug all 4 hard drives to one usb ? Like a fan out but with usb ?