I found same complaints in relation to the WD drive and got a link to "QuietHDD" - a small free program that made the irritating noise stopped instantly. Only glancing on it at perfectly what it does and the recent configuration, but here is the propaganda: Well, then perhaps you observed an bothering clicking sound that arrives from time to time. That is why we wrote rather HDD. This is a so small Windows app which eliminates the sound. Later spending few time in the growth of the more helpful and more were made, but even - and ever will be - a little utility to dilute noise. Rather HDD EeeHDD is the successor.