Try unplugging the HDD and plugging it back in. Its fixed it for me before.Or maybe its truly dead
Don't think it was dead, it was just workingand I've already tried plugging it and out.
Just because it was just working doesn't meant it can't randomly die. Uh, try running the hardware finder in the devices thing in control panel. (I hope someone gets what I mean because I'm slightly out of it)
You mean device manager?