Simplistic HDD Caddy

thingiverse

I came up with this minimalist design for a HDD caddy when I needed to squeeze four 3.5" HDD's into a tiny case for my home NAS. It works well for a four-disk array and I included a single spacer just in case anyone wanted to stack higher than four. I have successfully stacked up to six, however, I recommend using 35% infill when going that high because after all, HDD's can get heavy. The edges on the HDD support spacers are at 5mm which allows for plenty of airflow between the drives under moderate working conditions. My case had a 120mm fan directly behind pulling air out, which worked perfectly. I chamfered the bottom edge of the 5mm support spacers because I found that some 3.5" drives have impressions on the top that may interfere with the spacers. Drives cannot be installed upside down based on screw hole and spacer support position. This design is for a flat mount HDD setup, like the one you see in the picture.