1) Back up your data to nice quiet drives, just in case.
2) Download the diagnostics from the respective manufacturers and run them. Also check the SMART statistics.
3) What model WD drive is that? I'm not aware of one with integrated USB, so I could learn something.
All HDDs will make some noise, but it should not be much. Increased noise is often a sign of a mechanical problem that heralds an impending, or already present, failure.