How to save the file to external storage on gl inet ar750s on linux

so i have a python program which is constantly writing a .txt file. i want to automate the saving of this file to glinet external storage in real time. How can i do it?

You installed python?

You mounted external storage?

You can just save files using python to external storage. Anything difficult?

thanks for the reply.
do you know how to save and retrieve files from external storage using python?