To install these files on a PlayStation 4, follow these standard steps:

If they are individual PKG files (Part 1, Part 2, Part 3), they often need to be installed in order through the Package Installer menu. How to Install PES 2020 PKG Files

Most multi-part PKGs are compressed archives (e.g., .rar or .zip). You must place all parts in the same folder and extract the first one; the extraction software will automatically pull data from Part 3 and the others to create a single, installable PKG.

Place your eFOOTBALL_PES2020_part3.pkg (or the combined PKG) into the root directory of the USB drive.