we’re talking about a diy nas or a sinology one?

Aside from the loud 92mm fans (that can be mitigated via a fan controller or motherboard headers), and a bit of case noise now and then, I don’t really have any complaints.

that part scared me in the beginning, but if I can connect them to the motherboard or a controller than I’m fine. Do you think there is room for some sound absorbing foam to reduce loudness?

they don’t have hot swap bay