Sandy Landers

HI John,
Sorry for the delay in responding. I listened to both the video links you sent. It is NOT like the last one and not exactly like the first one. It is similar to the first one but slower with a pause in between the click sound. I did unplug my external drive and it was not that and the clicking sound seems to happen when the machine is not being used and sitting idle. I usually keep it in Sleep mode at the end of the day. Does this help any?