ZIP archive, 374 KB, labelled with the D865GSA motherboard model. What it contains is not stated in the name; it may be a BIOS image or repair documentation for that board. Unpack it with any standard archiver and inspect the files before using them. If a firmware image is included, read and keep a backup of the original flash chip with a programmer before writing, and make sure the dump size corresponds to the chip capacity. Confirm the model on the PCB matches the file name.
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.