Archive for the Gigabyte GA-H81M-S1, an Intel H81 micro-ATX board for LGA1150 processors, in a 2.70 MB RAR with no revision given. Open it to identify whether it holds a BIOS image or service documents. Gigabyte revisions are printed on the PCB and can require different files, so compare before use. For firmware recovery, write the image to the SPI flash with a programmer after reading and saving the original, and make sure the image size equals the chip capacity, since mismatched sizes will not fit.
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 @hrtechno. 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.