The save file for Mega Man X8 on PC is usually located in:
C:\Program Files (x86)\Mega Man X8\Saved Games Megaman X8 100 Save File Pc
If you're having trouble finding a 100% save file, you can try using a cheat code or trainer to help you progress through the game. The save file for Mega Man X8 on
C:\Users\<YourUsername>\AppData\Local\Mega Man X8\Saved Games Megaman X8 100 Save File Pc
or
You're looking for a 100% save file for Mega Man X8 on PC. Here are some details: