Orange Pi PC2 "box" with external hard-disk

I made this "box" to build a sort of archive-NAS to be put away from my LAN (different building). The USB speed and hard-disk speed are not essential since the Internet network is the bottleneck, so USB 2.0 of Orange Pi PC2 and USB drive are enough.

The space below the Orange Pi is for Toshiba HDTB420EK3AA Canvio Basics ([this](https://www.amazon.it/gp/product/B07994QL95/) on Amazon) but you can download the source FreeCAD file to adapt it to your needs.

To assemble the "box" you need to print:
- the base
- two back pillars
- two bridges
- one Orange Pi support
- one front pillar
- one fan support

You also need:
- one fan 3x3cm (like [this](https://ebay.us/v10MVS) one)
- four M3x30mm countersink screws (for back pillars and back part of bridges)
- three M3x25mm countersink screws (these can be longer, so M3x30 are valid as well, for front bridges and front pillar)
- two M3x10mm countersink screws (for Orange Pi support)
- two M3x16mm round head screws (for fan)
- e