The model is split in to several pieces to fit on to a printer with a build volume of 25 x 21 x 21 cm or 9,84 x 8,3 x 8,3 in. (Example Prusa MK3)
All parts are rotated for optimal printing with minimal supports.
Besides the printed parts you only need some filament strips and 6 mm black electric wire (for the side wire detail).
You can see more details in my build video:
https://www.youtube.com/watch?v=jT_OLkHsA_w

The model is split so you can print all parts in the right color and then assemble it.

Edit 24.04.2022:

Use 3-4 perimeters for the black rods and go really low infill and max 2 perimeters for all the parts above the head, otherwise it will be too heavy.
If your parts end up to heavy check out this remix by JPMakesStuff: https://www.printables.com/model/177328-star-wars-d-o-droid-head-support-block