You cannot open "Part 2" alone. You must have all parts in the same folder and use a program like WinRAR or 7-Zip to extract from "Part 1." It will automatically pull the data from Part 2.
This is a specific segment (Part 2) of a large multi-part compressed archive containing the for a fan-made patch. Because modern PES patches often exceed 50–100 GB, creators split them into smaller .rar parts (e.g., Part 1, Part 2, etc.) to make downloading more manageable for users with unstable internet. Key Features of the V18 AIO Patch
It updates the base PES 2021 game with the rosters, kits (uniforms), and transfers for the 2021/2022 season , bridging the gap for players who didn't want to switch to the newer eFootball titles.
"AIO" (All-In-One) means you usually do not need previous versions (V1 to V17) to make it work, but you must download all parts (Part 1, Part 2, etc.) before you can extract them. Usage and Safety Warnings
You generally need a clean installation of eFootball PES 2021 (PC version) and the Sider tool to run these mods.