EDIT: Oops. I totally swung and missed. Didn't realize this is actually a review of the Meshify 2 and not the S2. My bad.
I have the Meshify S2 and the hard drive mounting is very different than the unit reviewed here. Viewing the models on the fractal design web site, you have either a revised version of the S2 that isn't updated on their web site, or you have a Meshify 2. The S2 that I have, and pictured on the web site does allow for 8 hard drives, It has 3 brackets for mounting drives on the backside of the case and that is all. It is a fabulous case.