Asus P8Z77-V DELUXE Manual page 144

3. After the utility detects a new BIOS
firmware, save the BIOS firmware by
from the Save to field,
clicking
select the USB flashdrive, and click
Download.
4. After the download is complete,
click OK.
After you download the BIOS file to your flash drive, you can update the motherboard's BIOS.
Refer to 2.3.11 USB BIOS Flashback for details.
ASUS P8Z77-V DELUXE 4-15