It doesn't occur at all times, but when it does it's obnoxious. It didn't use to happen when I had a 5TB Toshiba 7200 internal, but it has happened ever since I installed a 12TB WD 5400 RPM white drive in the same drive bay. When the loud buzzing sound occurs, it will stop if I hold my finger on the front of the case but comes back when I remove the finger. Anyone have an idea how to stop the sound? I'm hoping I can find someone who has this particular case. For inserting the hard drive, it just has some plastic slots in the metal bay that the hard drive fits firmly in with no screw holes.