Hello, years ago (2017) I bought a cartridge to load roms, specifically it is the lynx sd from retro hq, I used it for a while but finally it was stored in a drawer for several years, the other day I tried to make it work but the surprise was that I didn't have the sd inserted ( sadly is lost) so that I am trying to remake an SD from the begining, the problem I have is that I don't know where to start because I have no idea about the flashcard firmware or the menu that I was using years ago, can someone please help me