: If you are gaming on a smartphone, a Retroid Pocket , or an Anbernic device, microSD space is a premium. Compression allows you to fit hundreds of games where you once could only fit dozens.
: While common for PSP and PS2, these are less typical for PSX but are sometimes used in specific mobile setups to reduce stuttering on mid-range devices. How to Compress Your Library
Host: "Here’s the trick. Don’t extract .pbp files. Just download DuckStation or ePSXe for Android, point it to the folder, and play. No BIOS? Check the description."