ZIP archive of 1.20 MB labelled N68D3(W), which reads as a motherboard model with a W variant suffix in brackets. The name does not state whether it holds firmware, a schematic or other service data, so inspect the contents first. Variant suffixes often mark different board versions, so the exact marking on the PCB should match before using any firmware inside. When reflashing, back up the existing SPI chip and confirm the image size equals the 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 @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