1. Plug your USB flash drive into your PS3, go to save data, and copy your save game to it. There are two save games, one is the regular save, the other is the backup. We only need the regular one, you can’t copy the backup anyways.
2. Plug your USB flash drive into your computer.
Hint: I recommend copying and pasting your save game somewhere on your computer before opening it in the garage editor, that way if something goes wrong, you have a backup. This will also help the creator fix whatever issue you may encounter.
3. Open the save editor.
4. Once the save editor is up, click “File” and “Open”
5. Now navigate to your USB drive and find your save game. It’s a folder labeled “PS3” and then inside that folder, there is another called “savedata” and finally inside the save data folder, theirs your save. Mine is in a folder labeled “BCUS98114-GAME”, but yours might be named differently if you live outside the US. Once you found it, click on it and then click “Select Folder”.