susan works in the research and development department. she recently purchased a large high-speed external drive and has attached the drive to her computer using a usb cable. her drive requires a minimum data transfer speed of 5 gbps and needs to have access to 600 ma/15 volts of usb power to function properly. although the correct drivers are installed, when she plugs her drive into her workstation, the drive is not working. to troubleshoot the problem, she has connected her drive to her coworker's computer, where the drive functions properly. no additional cables are required for this drive. which of the following is the most likely reason that susan's external hard drive is not working?