What's the issue with my HDD?

Hey there, ScarfWizard!

I'd recommend you to check the mounting of the HDD inside your rig and make sure that the noises are not caused by the placement of the drive. As the other guys mentioned, check its health and SMART status by running a diagnostic tool. If any errors pop up and the noises are persistent, I'd advise you to contact the HDD manufacturer's customer support and ask for assistance. You can also send them an RMA request and hopefully get a replacement.

Good luck!
SuperSoph_WD :)