Look for packs that match your current Batocera version, as required BIOS signatures can change slightly between major OS updates.
A: All bios files should be placed in the /share/bios folder. full bios batocera link
Once you've downloaded a complete BIOS pack, you need to get those files into Batocera. Here's the installation process. Look for packs that match your current Batocera
On your PC, open File Explorer and type \\BATOCERA . Navigate to the share/bios folder and drag and drop. full bios batocera link