Players making room for Grand Theft Auto 6 on PlayStation 5 may need to uninstall some of their installed games. Removing a game does not automatically erase its save data: the process deletes the game files, updates and any installed expansions or DLC, while saves remain stored on the console.
Save files can be deleted separately through the console’s settings. For games with saves that take up substantial storage, PlayStation Plus subscribers can upload them to cloud storage and remove the local copies, then download them again when needed.
Save data from PlayStation 4 games can also be copied to an external USB drive. That option is not available for saves from newer-generation games, according to the information provided.
Sources: Everyeye.it.