Corruption can occur due to incomplete downloads, improper extraction, or compatibility issues between different game versions. Ensure you downloaded the save file for the correct region (European, US, Japanese) and version of PES 6. If problems persist, try downloading the file from a different source.
Plug your PSP into your PC via USB or insert your Pro Duo Memory Stick into a card reader. Locate the Folder: Navigate to PSP > SAVEDATA .