I see no mention of a limitation. I wouldnt use anything over 16GB.
A 2GB drive or less will give you maximum support. No NTFS!
Why are you flashing the BIOS? 99% of the time a BIOS flash is the wrong answer.
EVEN WHEN DONE PROPERLY YOU RUN A RISK OF DESTROYING YOUR COMPUTER! DO NOT ATTEMPT! (Unless you know exactly what you are doing, why you are doing it, and what your expected end result will be.)
Thanks for your info.
Why wouldn't you use anything over 16Gb?
ASUS has released bios update every 1 or 2 months for Z77 boards. I think because of new chipset and architecture they needed fine tuning. I have updated my BIOS two times so far via ASUS software though Windows. The last update imporved my some issue I was experiencing with rebooting and also reduced the boot time.
I am going to buy a USB 3.0 flash drive for general use. So, I wanted to know if I bought a 32 Gb could I still use it to update the bios, just in case.