ASUS B85-PRO motherboard repair archive in RAR format, 388 KB. The board uses the Intel B85 chipset with the LGA1150 socket. The contents are not named, but an archive this size usually carries a boardview or a schematic. These help locate parts, follow nets from the PSU connector to the VRM, and track down shorted components. Open the extracted files in a suitable viewer such as OpenBoardView or a PDF reader. Always compare the PCB revision before trusting part positions.
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.