Heres a thought I had:

When playing video games, why does the file size of the game not increase as you play or make saves in the game?

Where is the saved game stored?

Perhaps im incorrect and the size of games grow as you save/play?

thoughts?

What game? I feel like there could be multiple ways to implement this for any game.

In some cases a "save" would be very light weight operation. Just write to disk a snapshot of a key set of states

Im just speaking generally.

im super green to all of this.

I don't think you can really speak "generally" about it, there are millions of games and I'm sure a lot of them save stuff in different ways.

Some games, you can imagine as having a set of yes-no questions or maybe a set of integers or floats. Like "has object foo yes/no" or "has N gold coins" or "is on level 12.5". If you gathered all these properties together and saved them to a file, then yeah, the file is going to stay the same size.

Other games, like say minecraft, might increase in size and complexity as you go on - because each block has some set of properties and as you explore, more blocks are created in front of you. You would expect this game save file to increase over time as long as you kept expanding/exploring.

okay I think that makes some sense.

What kind of games you are playing ?