That looks like the Fractal Define 6 case which already has built in soundproofing. I have mine on a desk doing the exact same job with even more drives and I don’t even hear it from a couple feet away.
Edit: actually not a Define 6 after looking closer. Mine doesn’t have those weird latches on the side panels despite otherwise looking identical.




Agreed. I’ve considered assembling some sort of motorized flip-down system as it combines both my hobbies in cars and electronics as well as my penchant for privacy.