These are "Package" files used to install software directly on the PS3's internal hard drive.
was a prominent online database and search engine dedicated to the PlayStation 3 (PS3), PSP, and PS Vita community, primarily used for retrieving PlayStation Network (PSN) assets like PKG files and RAP files . psndl.net ps3
For users with modified consoles running or PS3HEN , PSNDL was the go-to resource for "relicensing" software or accessing content no longer easily available on the official PlayStation Store. PSNDL - YNE These are "Package" files used to install software
The site functioned as a massive repository that indexed content hosted on Sony’s own servers. Users could search for specific games, DLCs, or applications to find: and PS Vita community