Fire Sharing Tips

I recently joined a small group of friends to help code their game, and I'm trying to set up some form of file sharing so that we can all have access to each other's work. My go-to was github, but the current size of the game is too large to upload. I have a few ideas, but I was curious if anyone had any tips for file sharing small team projects like this, or rough realities I might have to work through. Anything from code to art assets would be helpful.

Thanks for any feedback!