[PSX] How i can use a memory card in slot (physical port) 2

Is this feature implemented? I try to google but is cant find something useful (and that kind of search return so many results about SD memory card)

Can someone told me if i need a specific file name to that slot (some google pages said use ‘mcr’ file name but it didnt work for castlevania at least). Maybe there is another format or extension, maybe i can do that.

My specific problem is try to copy specific inside-game stuff from memory card slot 2 to memory card slot 1, i didnt find a way to do it.

This is the libretro format.

Resident Evil (USA).mcr Resident Evil (USA).1.mcr (mem card 2)

To enable it, open the mednafen/beetle psx setting and enable “Memory Card 1”. Once that is turned on, retroarch itself will generate the right file for you when you launch the game.

There’s a way to do that with PCSX-ReARMed?

Resident Evil (USA).1.smr but it doesnt work, and dont have memory card options, there’s no way to use slot 2?

Does someone know? please help me