So back in the days of the Atari ST we had compact disks (sic).
Most games shipped on a single floppy disk (so 720k or 1.4Mb) and rarely used compression given the base system only has 512k of RAM. The crackers would strip the protection, repack the data and patch the loading routines to handle that. Depending on the games they could fit 3 or 4 games on a single disk.
Nowadays the dynamics are different - games on consoles do use compression but they have to favour speed because they are streaming assets just in time. The PS5 even had dedicated decompression hardware to keep up with the data rate on it's fast SSD.
What do the inputs and configuration drop down menus say?