I have the western 500gb on a Series 3. The external drive was making a clicking noise but working, so I powered the Tivo and the drive down. Made sure the cable was in firmly on both ends and repowered up. Now I get the Tivo can't detect the external drive message. I have powered both down and up three times and still get the same massage. The drive was making a clicking sound but working fine. (Wish now I had not fooled with it). If I need to get another enclosure is there one from Best Buy that will work or do I have to get one off the net?