In the directory structure of PES 2021 (PC/Steam version), game data is stored in compressed archives known as CPK files . The file dt80_300e_x64.cpk is a specific data container that typically houses player kits (uniforms) and sometimes associated textures (boots, gloves, or adboards).
: It contains game assets such as player face updates, kits, and stadium data. Official Konami patches often add or modify these .cpk files to ensure the game has the latest seasonal content. dt80-300e-x64.cpk pes 2021