Yo,
I wanted to delete a game on the ps4 and wanted to ask whether the memory or the content of the game would be retained as soon as I wanted to reload the game via the library!
could anyone help me?
Yes, saved games will remain on the PS4 if you delete the game.
You would have to delete them separately if they should go.
I'm not sure about retro games though. I have some old games on it, e.g. FF8, the scores of such games are not shown to me in the others. With such games without guarantee.