Shrinking a game from several gigabytes to a few hundred megabytes reduces download times from hours to minutes, especially on slower connections.
Not all compression is created equal. If you are downloading or creating your own highly compressed PES files, these are the formats to look for: pes ps2 highly compressed
While official releases ended years ago, the community continues to provide highly compressed versions of both original and fan-updated titles: Shrinking a game from several gigabytes to a