The system case can accommodate three hard drives, but I wouldn’t recommend you to use it at all. The main basket isn’t practically cooled at all, so you won’t probably want to put a drive there. The case in ventilated with three fans, one of which is placed on the front panel:
And two more are on the rear panel:
The fans are all low-speed and almost silent, but the airflow they create is quite sufficient for cooling the small volume of that system case. The front-panel fan also blows at the cage with hard drives in the bottom stiffness rib. That’s why I decided to put my drive there.
The drive is thus ventilated well and can be also accessed easily.
The manufacturer also made two vent openings in the case’s roof for better ventilation:
One vent is above the CPU and another is against the graphics card. We’ll check soon how this solution helps in practice.