If you don't want to edit a save file yourself, you can simply download a pre-made one from a user who has already done the work. These saves are often shared on forums and file-sharing sites.
Whether you're looking to bypass the grind for materials or simply want to max out your favorite officer's stats, a Dynasty Warriors 9 Save Editor
A Dynasty Warriors 9 save editor is the perfect tool for players who love the chaotic combat of the Musou genre but lack the hundreds of hours required to grind out materials and max levels. Whether you choose to use Save Wizard on the PS4 or Cheat Engine tables on PC, always remember to back up your original files before making any changes. If you'd like to tailor your game further, let me know: Which you are playing on (PC, PS4, or Xbox One)? What specific items or stats you are trying to max out?