I have an extra hdd plugged into my pc (Windows 7) via USB3.0.
The PC runs 24/7 and saves CCTV footage onto internal and the one external HDD.
The external drive will randomly "disappear" from My Computer. When I look further into it the drive appears as unknown usb device. I then have to unplug the hdd from the power point, wait a couple of minutes and plug it back in.
Normally the pc picks the hdd up again; sometimes you have to do it a few times.
My questions is why and how do I fix this? Thanks :D