A save file configured for Yuzu with "extra quality" settings provides:
Using another person’s save file is fine for emulation if you own the game.
Never distribute saves from a real Switch with your personal Nintendo account info (linked NNID can be stolen). Pokemon Sword Save File Yuzu Extra Quality
This is the key differentiator. Many "Extra Quality" save files are edited using tools like PKHeX to include: A save file configured for Yuzu with "extra
Warning: Always scan downloaded files with antivirus software. Never run .exe files disguised as save files. This is the key differentiator
Launch Pokémon Sword. You will either appear at a Pokémon Center or at the title screen with new data loaded. If the game says "Save data is corrupted," you may need to disable "Strict Mode" in Yuzu’s configuration or ensure your game update (e.g., v1.3.2) matches the save file’s version.