Hey! Something similair happened to me today. Just before lunch I got some error messages as well, don’t know if they’re same as yours, didn’t read them, just clicked ok, then my PC froze, I restarted and after that my external HDD isn’t recognized. I have My Book Essential 1TB. When I plug in usb cable I can hear that beep sound window makes, but HDD doesn’t load. I can actually see it in Device Manager and it says it’s working fine 
I tried connecting it on laptop with W7 on and it’s the same, you can hear the sound W7 does but nothing loads. Does this mean it’s dead? Did I lost my data? I have like 90% of my backups on this drive. Would **bleep** if it’s all gone!
