If you are talking mainly PS1 I would look in to how to convert to .pbp files. I’m sorry I would link you but am on mobile right now.
it is a pain in the ass if you have a huge library but what PSX2PSP converter does is takes your bin/cue files and makes them one .pbp file and also compresses it to save space. Other thing it allows you to do is take multi disc games and make them one .pbp file.
So say FFVII, four discs, four cues, four bins and around 3.X gigs. After running it through PSX2PSP I just one FFVII.pbp file and about 30% less in size.
It does take a long while and patients if you have a full set. I’ve actually been slowing converting my full PS1 set over and think, come this weekend I will finally be done. I Just do a hour or two a weekend.
But very happy I did it.
Just google PSX2PSP and I’m sure you’ll find it.