RAR of about 21.4 MB with firmware for what the name suggests is a Lenovo G580 laptop. The large size implies a collection of dumps or tools rather than one image, and no board number or version is named. Since the G580 shipped on more than one motherboard design, the exact board code printed on the PCB should be identified and the matching image chosen. Dumps like these are programmed into the SPI flash with a programmer; save a read of the original chip and check image size against 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 @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 →