If you use Steam Cloud, the game syncs these .dat files automatically, but manual backup is still recommended.
Once deleted from system storage and not in cloud, it is nearly impossible to recover. PlayStation and Xbox do not offer file-level recovery tools. Dynasty Warriors 9 Empires Save Data
Starting a new "Conquest Mode" after a victory allows you to keep specific assets: Maintained Items : You retain all personal resources, including horses, gems, and artifacts If you use Steam Cloud, the game syncs these
Never rely on a single save. Use Slot A for before major battles, Slot B for after each season, Slot C as a rolling autosave backup. If you use Steam Cloud