There are several old Gigabyte Motherboards like the GA-MA Series which uses their BIOS Included Q-Flash Utility for upgrading. This tool tries to access an attached USB Device in a file browser way to give you the choice on which file to flash. Most of the time, you won't be able to access your drive, as it will only be shown as "Floppy B". In truth, this means your USB drive is formated the wrong way: You should have only one partition on that stick, with size LESS than 128 MB and FAT as file system. Yeah, I figured that out the hard way ^^'. It will then be shown as "HDD 0-0" in Q-Flash and will provide your files for easy upgrading 🙂