@Jain @SuperDicq @icedquinn Like I said: Fitgirl only compresses the installation media. The game after installation will not be any more compressed (read it will be uncompressed). So by downloading the files directly there is less space required due to not having to reserve a "installation media" space. Fitgirl stuff only saves bandwidth, not space.

You CAN use compression on the drive level (even ntfs has had compression support a long time). It does yield space saving on games with uncompressed files with minimal CPU overhead. However most modern PC games are compressed and drive level compression doesn't do enough to be worth it for gaming.