With the battery and the four screws for for the hard drive caddy removed, lift the caddy up and flip it toward the headphone end of the Zune. Remove the hard drive cable clip by opening the black clip on the connector. Use your fingernails or the iPod tool to move the clip carefully to the open position. Take off the sticky tape to reveal the hard drive bumpers. Remove them to free the hard drive. Now replace the hard drive and reassemble the Zune.