setup pymongo and revise python code

I need help setting up pymongo and revising my existing Python code. I currently have a python code that uses a MongoDB. However, due to storage limitations on my Mac I try to save the files on an external USB device. Further, my code needs some revision. I am not a developer and did some coding on my self. the program is not well structured and needs some optimisation to improve performance. Some of the code might not be compatible with different versions of python and mongodb and other packages.

There is about 800 lines of code.

I am looking for a skilled freelancer to help with this project!