3ds Bios File Download For Android File
Assuming you have legally obtained boot9.bin and aes_keys.txt, here is how to set up your Android emulator correctly.
Using Citra (Official or MMJ):
sdmc folder for saves:
Pro Tip for Android performance:
Once you have the legally dumped BIOS files (or decided to risk downloading them, which we strongly advise against), here is exactly how to install them for Citra on Android.
Use OkHttp or HttpURLConnection for downloading files. Here’s a simple example with OkHttp. 3ds bios file download for android
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class Downloader
public void downloadBIOS()
OkHttpClient client = new OkHttpClient();
Request request = new Request.Builder()
.url("your_bios_file_url_here")
.build();
try (Response response = client.newCall(request).execute())
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
// Save the file
String filename = "bios_file.bin"; // Define your filename
File file = new File(getExternalFilesDir(null), filename);
try (FileOutputStream fos = new FileOutputStream(file))
fos.write(response.body().bytes());
catch (Exception e)
e.printStackTrace();
The 3DS BIOS is copyrighted intellectual property of Nintendo. Distributing or downloading these files without owning the original hardware is illegal in most jurisdictions under the Digital Millennium Copyright Act (DMCA) and similar international laws.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Even if you ignore the legal risks, downloading a pre-packaged “3DS BIOS file” from a forum or file-sharing site poses serious threats to your Android device: Assuming you have legally obtained boot9
The 3DS emulator is CPU-intensive. Your phone will get hot. Use a cooling fan or take breaks to prevent frame drops.
The only ethical and secure way to obtain 3DS BIOS files for Android is to dump them from a Nintendo 3DS console that you own. This process is called dumping or ripping. Also create a sdmc folder for saves:
