Select 'Eject Disc' and then change 'Current Disc Index' to the disc you want to use and then just select 'Load New Disc'. To change the disk in retroarch click both sticks in and then go down to 'Disc Control'.It should show up as one selection on your ps1 games. Put that folder where you put your ps1 games and then run Emulationstation.you can also go to your file browser, click on view, and then select 'show file extensions' and then just rename the file.

txt and select 'all types' and make the extension. To save as another file click on 'save as' and at the bottom click on the dropdown that says. m3u file in the same folder as the game files. The name of the folder is what name will show up in Emulationstation for that game. cue file names (The whole name even the file extension) to the text document in the order the discs are played (Disc 1 on the first line, Disc 2 on the second line, etc.). Once you have the folder named and the files inside that folder open up any text editor you want (notepad, kwrite, notepad++, etc.).Do not use spaces or anything other than letters, numbers, or underscores in the game's file names or folder names. Name this folder GAMENAME.m3u (yes you have to put '.m3u' at the end of the folder name minus the quotes). Put all of the files for all of the discs in one folder.This guide will hopefully clean up your Emulationstation and let you play the whole game without having to go back and forth. After searching for a while I finally figured it out and wanted to share it with anyone else who is going through this. I was also having trouble switching discs because for whatever reason Retroarch wouldn't transfer the save over to the next disc. I recently went to play Parasite Eve and was annoyed that the files were all showing up and only two were the actual games.

M3u file format emulator