ASUS BIOS dump of 4.00 MB shared by the X550DP and X750DP models, with the name citing revision 2.0, most likely the mainboard revision. No file extension is given, so it is probably a raw image sized for a 32 Mbit SPI flash chip. Technicians program it with an external programmer to recover a board that fails to start after a bad update. Confirm the PCB revision reads 2.0, read and save the existing chip contents before erasing, and check that the chip on your board is a 4 MB part.
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 @biosarchive. Enginerys does not host this file.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →