A 1.20 MB ZIP archive named N68DD, apparently a desktop motherboard model code; no revision, brand or content type is given in the name. Unpack it with a standard archive utility and identify each file by extension before relying on it. If it contains a BIOS dump, check that the image size matches the board's flash chip, save a read of the original chip with a programmer, and confirm the model marking on the PCB so the wrong firmware is not written.
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.
Built-in OS tools7-Zip