ASUS Sabertooth P67 motherboard archive, 288 KB, packed as RAR with contents not listed in the name. The P67 chipset belongs to Intel's LGA1155 Sandy Bridge generation. A file this small is unlikely to be a full BIOS image and more likely holds boardview or similar repair data for locating parts and nets. Extract it and check the format before use, then match the board revision printed near the slots or on the PCB edge to avoid misreading placements.
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 @boardview. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)