An official PlayStation file format used for games, updates, or DLC. FPKG (Fake Package):

These are high-quality, verified files direct from Sony. They include all necessary data and automatic license verification.

: The "solid" argument often hinges on the preservation of digital-only media. When Sony eventually shuts down the PS4 servers, PKG backups may be the only way to ensure access to purchased content. Key Ecosystem Tools PS4 PKG Tool