For people using a retrosoft for example. Which is basically all emulators loaded onto a game boy type machine. There is an SD card which holds all the games.
Download FF7 (example) 3 disks on your phone or PC. IF phone then extract all 3 files and then put all the bin and cue files in the one folder. Take out the SD card on your retrosoft and put it in the pc. Then copy the folder with the 3 disks in the appropriate folder (psx as an example)
When you put the SD card back in the retrosoft and open disk 1 it will automatically create a new SRM file.
All you need to do at the end of disk 1 is go and change this file name to the exact same as disk 2 file.
So in my example picture below I would change (disk 1) to (disk 2) and then when I load disk 2 on the retrosoft again it will see that file ... do the same for disk 3 or backwards to disk 1 again
See picture below
https://ibb.co/4kXr2jY