Git push sends all files or just changed ones?

Question

git

I can't figure out what exactly git push does. Does it send all the files directly, or only those that we changed in the commits?

Answer 1

https://github.com/git-guides/git-push#what-does-g...
What Does git push Do?
git push updates the remote branch with local commits.

Answer 2

Git does not work with files, but with changes. They are stored as commits