Archive related to the Gigabyte GA-B85M-D3V micro-ATX desktop motherboard, built on the Intel B85 chipset as the model name indicates. The 660 KB ZIP gives no further detail about its contents, which may include a BIOS file, schematic or other service data. Open it and check what is inside before planning a repair. If it holds firmware, confirm the board revision silkscreened on the PCB matches, and dump the original chip before flashing. Gigabyte boards often have dual BIOS chips.
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 @schematicslaptop. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.