If the hard disk is making a louder than usual ticking/clicking noise then it is most likely on it's last legs. In any case it is an unreliable medium to store data on.
Therefore it is time for a replacement which are
available here for the A600 / A1200If data is salvagable from the drive, then we use a
USB->2.5" hard drive adapter which is compatible with USB controllers such as the
Spider and
Subway and allows data transfer from the ailing minature drive to another hard disk. Note that data can be salvaged in this way if the drive is still showing up a valid Amiga device.