Save data lives under /user/home/<user>/savedata/<TITLE_ID> on the console.
The Saves page lists every folder it finds, resolves the game title from the
installed library, and shows the file count and size.
The job writes ps4-saves-<timestamp>.zip into the download folder. Each
entry keeps the title id as its top folder, so the zip can be restored by hand
if the app is gone.
/user/home/<first user>/savedata/<title id>.Close the game first: the console caches save files while a title is running.
Delete asks for confirmation and removes the folder. There is no undo.