So, I'm doing my build for my brother today. And when I look at the manual of the case, it shows me to use the screws used to screw in the PSU (6#32*6, there is 20 of them) as well as screwing in the motherboard, I'm getting confused as there is another set of screws, the M3 that I usually see other cases use to screw in the motherboard. But that is only for SSDs and ODDs it said in the manual and the quantity is 20 of them as well. Why do I need 5 SSD? I'm not running a NAS. Btw the case is CoolerMaster Elite 311 Plus.