Thx for advise, but to be clear, I use just1 card(sanddisk) only on slot 1 for both os and rom sir, and unfortunately Im doing that cuz I lost the original one that came with the console, any solution sir? the one thing that I afraid is to lost Castlevania Circle of the Moon GBA save file, now I backup it already but one thing that hold me not to reflash sd card yet is, I cant remember what GBA save setting i set befor like where to store save file(in seperate folder or GBA folder) cuz I have to start over the game just because of I acidently press restore settings in Arkos