A western digital hard disk which is clicking and not getting detected by windows or mac, can give data. Usually the fault can be electronic,firmware, or media. The approach is to diagnose the correct fault and correct it. Full recovery is not possible in a hard disk which had one of the reading head faulty.Full recovery is possible except for the data trapped in bad sectors IF ITS A FIRMWARE FULT OR A ELECTRONIC FAULT. A general concept that a Western digital hard disk, which is clicking and stopping or clicking continously always has crashed heads is a HOAX. Contact us if you have such a haed disk for data recovery needs.