My MYBook Essential 2TB USB3.0 is no longer recognised by the PC and I’d like to get my data back. The unit was working okay before this, and I can hear the drive spin and self-test okay (status light stays on when powered up), but when I connect to the PC, it just flashes 3 times a second, and locks up the system. I can’ see it in the Disk Manager. the system tells me my disk must be initialized first. When I try to initialize the disk an error “The request could not be performed because of an I/O device error” occurs. Please advise what to do.