I don't know "which" clicking, one of the sources I read said it's because the header or whatever it is, is trying to access the platter's firmware and failing, the clicking is each time it tries and failing. I think it's somewhere between 8 - 10 times, I haven't plugged it back in. It detects as ST_M13FQBL, with 3.86GB of space. On Windows, it shows as a "Not Initialized" disk. It does sound like it spins up, then tries to read the platter firmware, after the clicking, it winds down.