Without the RAP file, the game will either ask for a PSN activation code or crash on launch.

These are "Backup Managers." They allow you to browse your file system and help "mount" games if you are using ISOs, but they are also great for managing files on your USB drive.

Since many PS3 titles exceed the 4GB FAT32 limit, many users prefer using over PKGs for retail games. However, for DLC, updates, and indie titles, PKGs remain the best format.

When you download a PS3 game backup, you typically find two formats: