Snapshots do not multiply storage: identical content is stored once, and packs store the newest version of a file whole and older versions as deltas.

It removes the main objection to the snapshot model and explains why repositories stay small.

A photo of every file, every commit. That sounds like a lot of space.

It is not. Identical content has the identical name. So Git keeps one copy, and every photo points at it.

A file you edit does get a new blob. One line added to a long file, a whole new copy.

Now and then Git packs. It keeps the newest version whole. Older versions are stored as differences from it.

So photos are what you see. Differences are a storage trick underneath. You never have to think about them.

Check yourself. You commit ten times without touching a large image. How many copies of the image does Git hold?