If you want to use a 100% completion save from sites like GameFAQs or RetroMaggedon , follow these steps: Option 1: Direct Import (Easiest)
Always copy your existing Mcd001.ps2 file to a safe location before importing new data to avoid losing your own progress.
Move the updated .ps2 memory card file to your phone's AetherSX2 memcards folder. ⚠️ Important Considerations