Depending on the version of Citra you are using (Official or Enhanced forks), the data folder is typically located in your device's internal storage:
If you see “3DS BIOS file download for Android,” run the other way. Stick to the official Citra app, use your own decrypted ROMs, and ignore any site promising a BIOS. The only files you might need are keys you dump yourself from a real 3DS. Don’t let scammers turn your emulation dream into a nightmare. 3ds bios file download for android
Downloading them from random websites can be a legal gray area (or illegal, depending on your country). Furthermore, downloading BIOS files from unverified sources is a common way to accidentally download malware or viruses onto your Android device. Depending on the version of Citra you are
If you dumped a config.bin file, place it inside citra-emu/nand/data/00000000000000000000000000000000/sysdata/00010017/ . Troubleshooting Common Android Emulation Issues Root Cause Game fails to load / Black screen The ROM file is likely encrypted. Don’t let scammers turn your emulation dream into