MSI H55M-P33 manual Age drive. It only supports particular file name

MS-7636

M-Flash

== BIOS Update or Boot 2nd BIOS From USB drive== ▶M-Flash function as

M-Flash function allows you to flash BIOS from USB drive/ storage drive (FAT/ FAT32 format only), or allows the system to boot from the BIOS file inside USB drive (FAT/ FAT32 format only).

[Disabled]	Disable M-Flash function.
[BIOS Update]	Flash BIOS via the USB/ Storage drive directly. Update BIOS ROM
	chip data from selected file, which was be download from official
	website and must be saved in the root directory of the USB/ Stor-
	age drive. It only supports particular file name,
	which is the official BIOS file name from us.
[Boot]	After allocated particular BIOS file, system will boot from this BIOS
	file which saved in the root directory of USB drive. System will skip
	MB ROM chip data and boot with this particular BIOS inside USB
	drive. Note: this option is for USB drive only.

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