GBA in R4

im curious, where we must copied the gba rom? is there any slot for memory card in ezy 3 in 1 flashcard? or we just copy the gba rom in micro sd (on EDGE)? is there any software for ezy 3 in 1 to run the gba game (like edge 1.45)? thanks, i dont wanna waste money because in my country ezy 3 in 1 sold about 50 USD

The GBA rom is stored in slot-1 memory (ie microSD cards). It is then written to the 3in1 with a homebrew such as GBA ExpLoader, which you can find on linFoxDomain or GBATemp.

need slot-2 doctor