This guide explores how to load files and run code on a MicroPython board. In the earlier introductions to MicroPython you manually typed all the code you wanted to run into the board’s serial REPL. This process is great for learning and experimenting, but not great for developing and running complex programs because you have to type in the program every time you want it to run. However MicroPython has an internal filesystem which can store code that’s run whenever the board powers up, just like an Arduino runs an Arduino sketch. Using a simple tool you can learn how to load code and other files into MicroPython’s filesystem and enable an ‘Arduino-like’ workflow for developing code on your computer that runs on a MicroPython board.