RAR archive that, by its name, holds Gigabyte BIOS version F8 for the GA-F2A88XM-D3H board, following Gigabyte's usual naming of model code plus version. The 3.35 MB archive likely contains the ROM and possibly a flash utility. It can be applied through Q-Flash, or the extracted image written to the SPI chip with a programmer to revive a bricked board. Read and keep a backup of the existing chip first and confirm the image size matches the flash chip capacity.
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 @vinafix_bios. 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.
7-ZipWinRARThe Unarchiver (macOS)