ASUS-related archive marked B360M-PIXIU, a board based on the Intel B360 chipset, with the number 3202 that likely marks the BIOS version. PIXIU boards are typically OEM designs supplied to system builders, so check the exact model printed on the PCB. At 7.33 MB it probably contains a compressed SPI image for recovery with a programmer. Extract it, compare the image size with the flash chip, and back up the existing firmware before writing, since it stores the board-specific network and system data.
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 @biositechyangiyer. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.