Copy the downloaded save folder into the SAVEDATA directory on your USB drive.

Stay boosted. - Retro Racer

One of the most common complaints for NFS Carbon on PS3 is the "Corrupted Save Data" error. This often happens if the console is turned off improperly or if the file system errors occur.

Original 60GB and 80GB PS3 models are prone to file system errors that can wipe dozens of hours of progress. Why "Better" Save Data Changes the Game

The PS3 era is notorious for data corruption, especially in older games. Proper, regular backups ensure you don't lose hours of grinding.