BIOS dump for the ASUS X551CA motherboard, revision 2.2, marked OK in the name, which suggests it was read from or tested on a working board. The raw 8 MB binary matches a 64 Mbit SPI flash chip, the usual size on this generation of ASUS notebooks. Technicians write such an image with a CH341A or similar programmer when the original firmware is corrupted. Confirm the board revision printed on the PCB, back up the existing chip contents first, and expect to restore the serial and MAC data afterwards if needed.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @skclappybios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →