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Since FAT32 cannot handle files larger than 4GB, use an drive for the full 12GB version:
In the context of the PlayStation 3, a .pkg file is essentially an installation package—similar to an .exe file on Windows or an .apk on Android. Officially, Sony used this format for digital purchases from the PlayStation Network (PSN). When a user bought a game digitally, the console downloaded a .pkg file and installed it to the hard drive.