I can't tell if it's one of the hard drives or if it's a fan. Every time I try to figure out what it is it mysteriously stops. It knows when I am looking for it :nervous:

EDIT: Solved. I finally was able to hear the clicking noise with the case open and thankfully it was just a fan. I took the fan out and cleaned it and so far the clicking has stopped. I'm so happy it wasn't one of the hard drives