I have 2 Western Digital My Book external USB 3 HDs. They are about the same age. One is a 3 TB the other is a 2 TB. They both are set up exactly the same. The power options settings are set never turn off and in properties don't turn off to save power. I've also done the registry hack to usbstore DeviceHackFlags to 400. The 2 TB is always awake, but I have to wait for the 3TB to wake. Any ideas on how to keep the 3TB awake?