https://github.com/MMjoy
https://forum.dcs.world/topic/99954-mmjoy
https://www.instructables.com/Create-a-Joystick-Using-the-Arduino-Joystick-Libra/
or
https://www.siminnovations.com/
I have 2T drive for MSFS and it has 600GB free now. Addons consuming much space. Two drives are better for safety, but for MSFS 2T drive is better for future use.
Mark