If you still face issues, format a new card in AetherSX2, boot UFE3, save at the first opportunity, then verify the save loads after closing and reopening the emulator.
Ultraman Fighting Evolution 3 is highly sensitive to region settings. If you are playing the version of the game, the emulator setup must match. Ultraman Fighting Evolution 3 Save Data Aethersx2 Fixed
: Search for the "Aethersx2 Fixed" version on platforms like YouTube or emulation forums to get the .ps2 or folder-based save. If you still face issues, format a new