The is the core database file used by the PKGi homebrew application on a jailbroken PS3 (CFW/HEN) to display and download content. It essentially acts as a map, telling the software exactly where to find game files on external servers. The Story Behind PKGi
For the app to function, the text file must be placed in a specific internal directory on the PS3 hard drive. 1. File Placement ps3 pkgi txt file