Steam performed a "content conversion" on my game before starting it. Does that save any disk space? How much?
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
Valve are (slowly but surely) converting all of the games on Steam to use a more efficient format which will allow updates to be downloaded much quicker and use less bandwidth in doing so. It does save space on your hard drive, but the amount varies per game.