RAR archive for the ASUS A78M-E, an AMD A78 chipset micro-ATX motherboard for FM2+ APUs, about 201 KB. The name does not list the files inside, which are probably a boardview or schematic for repair. With them a technician can locate the VRM controller, follow nets to isolate a short, and find the flash chip for reprogramming with a programmer. Open the archive with 7-Zip or WinRAR, and compare the PCB revision before relying on the data.
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)