When I plug in my external HDD I hear the USB noise, but it does not show up under My Computer. It does however show up and it allows me to safely remove the device, though it doesn't have the original device's name (FlexDrive). So instead of "Eject Flexdrive" it says "Eject External".
I've been having this problem with this HDD for a while now, but I would just eject it and plug it back in and it would recognize. This time it was a different story, it is not recognizing, even though it lights up and the disk starts to spin.
This is what disc management shows as well (also showing what I meant when trying to eject):
EDIT: lol, for example right now. I just ejected it and plugged it in again and autoplay came up... =/
EDIT2: And now that I have it working, this is what it looks like:
EDIT3: And this is what disc management looks like when it is working: