I bought a new 1tb hard disk for 50€. But in the PC it is the loudest component. I'll show you how to make the HDD silent.
Step 1: You Need:
You only need a unused 5" drive space, a sponge and the vibrating HDD.
Step 2: How To?
I used 2 sponges, split each in half. Put the sponges around the hard disk. Finish!