Based on community votes, these are the best types:
Managing RE4 saves on AetherSX2 is a matter of placing the .ps2 file in the memcards folder and ensuring the region matches your game. Always prioritize saving at the in-game Typewriter to prevent data loss.
: To move data between virtual cards, you can boot into the PS2 BIOS within AetherSX2, open "Memory Card 2," and copy the specific Resident Evil 4 save to "Memory Card 1".
AetherSX2 mimics the original PS2 hardware by creating (usually .ps2 or .mcd files). When you save your game at a typewriter in Resident Evil 4, the data is written to these digital files stored in your phone's internal storage. How to Locate Your Save Files
Use the PCSX2 emulator and a tool called MyMC to open your .ps2 memory card file.