The file 'Fan For Soldering From Old 2.5inch Harddisk 3D Printer Model' is (stl) file type, size is 58.4KB.
Print without supports
https://youtu.be/Bdx2GcKDtuA
Controller 5V-12V-DC-Brushless-Motor-Driver-Board-Controller-For-Hard-drive-motor-3-or-4-wire-p-1018624
https://www.banggood.com/it/5V-12V-DC-Brushless-Motor-Driver-Board-Controller-For-Hard-drive-motor-3-or-4-wire-p-1018624.html?akmClientCountry=IT&utm_campaign=12686806_1192297&utm_content=11209&p=3Y290412686806201707&cur_warehouse=CN