You can copy PS4 game saved data from your source console to a USB drive, and then use the USB drive to copy the data to your destination console. If you already have saved data for the same game on your PS5 console, you can replace it with the saved data from your USB drive.
When using a PS5!" console, you may have the option to upgrade a disc or digital PS4 game to the digital PS5 version. Depending on the game, this upgrade may occur at no additional cost, may require a purchase, and may be available for a limited time. An Internet connection is required.