The game does not store saves in the installation folder. Instead, it uses a folder within your Windows (or My Documents) directory:
The save file architecture of Dynasty Warriors 4 Hyper is a textbook example of early 2000s PC porting standards. It relies on a static directory path within the user's Documents folder and utilizes unencrypted or lightly obfuscated binary files. For users seeking to preserve their progress, the critical "work" involves ensuring the application has the necessary Administrative privileges to write to the Documents folder and maintaining the strict folder hierarchy required by the game engine. Understanding this structure ensures data persistence across hardware migrations and OS updates. dynasty warriors 4 hyper save file work