A file is the official digital distribution format used by Sony for the PlayStation Network. Unlike an ISO file—which is a 1:1 sector-by-sector copy of a physical disc—a PKG is a compressed installation file, similar to a .zip or .exe on a computer. PKG (Digital) ISO (Disc Image) Location Installs directly to the PS3 Game menu (XMB) Requires a manager like webMAN or multiMAN to "mount" Load Times Faster; utilizes the full speed of the internal HDD Standard; emulates the 9MB/s speed of the BD-ROM drive Storage Occupies internal HDD space once installed Can be stored on external NTFS or exFAT drives Licensing Requires a corresponding .RAP file (license key) Operates as a "fake disc" without extra license files Why FIFA 14 is Still Worth Playing