Download the correct kernel/firmware for your specific flashcart (such as Wood R4 or YSMenu). Extract these files directly to the root directory of your MicroSD card.
If you legally own NDS games and want to back them up: nds roms pack best collection install
In this guide, we will cover everything you need to know: where to find reputable packs, how to avoid malware, the best file structure for your library, and a step-by-step install guide for both PC emulators (DraStic, DeSmuME, MelonDS) and flashcarts (R4, Ace3DS+). how to avoid malware