Loading a completed save might auto-pop trophies, which some players consider cheating, or it might glitch them entirely, preventing you from ever earning them legitimately on that account. To help you get exactly what you need, let me know: Do you have a Save Wizard subscription to resign the save? Are you looking to transfer this save to a PS5 later?
Importing a PS4 save file is more complex than on PC because saves are encrypted to a specific PSN ID.
Before you download anything, you need to understand what you are looking at. The keyword isn't random gibberish; it is a specific set of identifiers.