And here is an example from late last week on how to do exactly this (load an ephemeral .mpy file) -- https://github.com/micropython/micropython/pull/5408Christian Walther wrote: ↑Fri Dec 13, 2019 2:01 pmIf all else fails, there is a new example in the docs of how to make a filesystem in RAM: http://docs.micropython.org/en/latest/r ... ck-devices