like macdrone said i have only had floppy drive do that when i was using an 800k drive in a 128/512/Plus and was not using the floppy cable with the yellow stripe.

The only other situation where i had clicking is, a 512k that had metal covers over the rom's erase hole, somehow they became disconnected during shipment and was stuck on the magnet in the floppy drive, and with a disk inserted it would go CLICK CLICK CLICK.