If you already own a legal disc copy of PES 2020 for PS3, downloading a PKG as a backup is a grey area but justifiable. If you have never paid for the game, consider buying a used disc on eBay for $5-$10 first, then using the PKG for convenience.
: For licensed kits and badges, follow these steps to install save data/option files via the Saved Data Utility. pes 2020 ps3 pkg link
Since there is no official release, the community uses the engine as a foundation. By applying a Potato Patch or similar comprehensive mods, the base game is transformed to include: Updated Rosters: 2019/2020 season transfers and lineups. If you already own a legal disc copy
Most "PES 2020 PS3" versions found online are actually modified versions of PES 2018 (the last official PES released on PS3). These mods update rosters, kits, and faces to match the 2020 season. Since there is no official release, the community
—custom modifications of older game engines (usually PES 2013 or PES 2018) that update rosters, kits, and graphics to match the 2020 season. Where to Find Valid Mod PKGs