@kjm said in File system problems & solutions: the windows version of this CLI The CLI program should probably just be the same .exe file which is also the graphical thing. According to [1], its default location might be c:\Program Files (x86)\Pycom\Pycom Firmware Update\pycom-fwtool-cli.exe. [1] https://community.hiveeyes.org/t/setup-commandline-based-micropython-development-environment-on-linux-macos-and-windows/1639/15