This is the most common way players share saves today. These are usually compiled into a .pkg file. You install it like a game update or DLC, and it places the save file directly onto your PS3.
Everything is unlocked. All costumes (like Fear Kratos), all weapons fully upgraded, and all treasures found. Ps3 God Of War 3 Save Game Files
Ensure you download a save that matches your game's Region Code . This is the most common way players share saves today