Only download PKGs from community-vetted sources with comment sections. Never run a PKG named "Update.pkg" from an unknown source.
The PKG format remains the backbone of the PS3’s digital ecosystem. For developers and enthusiasts, mastering the manipulation of these files—through tools like PS3 ContentID games pkg ps3
Unlike physical discs or folder-based backups (ISO files), PKG files act as automated installers PKG files act as automated installers