BIOS firmware for the Gigabyte GA-B150M-DS3H desktop motherboard, revision 1.0, in a 13.9 MB RAR. B150 indicates an Intel B150 chipset platform. The archive probably holds a full SPI image, including the ME region, for writing with an external programmer, possibly along with an update file. Before flashing, back up the original chip, which holds the board's MAC and serial data, confirm the image size equals the chip capacity, and check that the board revision printed on the PCB is 1.0.
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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →