How do I update the BIOS using only a USB drive on a Asus z97-ar?

[Emrock9]

I'm trying to figure out how to update my BIOS using a flash drive (formatted to FAT32, loaded with latest BIOS) and the motherboard. However, whenever I plug in the USB drive to either a 2.0 or 3.0 port on the motherboard, it lights the LED in the USB drive for a second, then turns off.

Is there something I'm missing or doing wrong? I can't find a tutorial for this anywhere so hopefully someone can help me understand what's wrong.

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My build:

- Asus z97-ar motherboard

- Core i7-4790K

- EVGA Supernova 750w

- 2x8gb G. Skill Ripjaws RAM

- EVGA Geforce 1060 6gb

- THOR V2 full ATX case

 

[SinxarKnights]

You use EZ Flash 2 from within your current BIOS.

See here in your manual: http://dlcdnet.asus.com/pub/ASUS/mb/LGA1150/Z97-AR/e9472_z97-ar_ug_v2_for_web_only.pdf

section 2.1.2