ZIP archive of 2.68 MB for a Daichi motherboard based on the H61 chipset, as the name states. The exact contents are not specified, so it could be a BIOS image, schematic or other repair data. Open it with a regular archiver before use. H61 boards store firmware on an SPI flash chip, which can be rewritten with an external programmer when the board fails to post. Back up the original chip first, confirm the image size equals the chip capacity, and compare the PCB markings with the file.
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 @laptopchiplevelrepair. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.