A 768 KB zip archive for the Gigabyte GA-H61M-S2 motherboard with the Intel H61 chipset. No revision is given in the name and the file type inside is not stated, so it could be a BIOS image, a schematic or other repair data. Because Gigabyte released several PCB revisions of many boards, read the revision printed on your board and verify the archive suits it. When the contents are a flash dump, compare its size with the SPI chip capacity and back up the existing chip before writing with a programmer.
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 @schematicslaptop. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.