ZIP archive of 1.38 MB named after the A880GZ motherboard. The name gives no information about what is packed inside, which could be a firmware dump, schematic or service file for this board. Extract it with a standard tool such as 7-Zip and inspect the contents. Technicians use such material to reflash a corrupted BIOS chip or to trace signals while diagnosing. Back up the original flash before writing, check that the image size equals the chip capacity, and compare the PCB model marking.
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.