I was looking for a fix. Because I don't like it. "Sleeping Hard Drive". I am hoping I found something here. For the WD "My Book". Or any WD hard drive really. You can download a tool from WD. To manage the hard drive. Files are not on the hard drive but instead works inside the enclosure circuit. You hook up the HD to say a laptop. Open the utility. Select settings and turn off sleep timer. You can also turn off the light/LED if you wish. Should know buy tomorrow if it works. If the sleep is controlled by the hopper. It won't work. If it's controlled by the enclosure circuit. Done deal!! Also I had first setup and formatted the HD on the Hopper 3 before I changed the settings. Don't think it makes a difference. Good luck