1. Get to Biostar website : https://www.biostar.com.tw/app/en/index.php
2. Search the model on the upper right corner.
Ex: X470GT8
3. Select "X470GT8"
4. Click Download.
5. Select the BIOS file to download.
6. Then you can download the BIOS file.
Note: You can to use "F12" update BIOS.