RAR archive of 148 KB for a board named F8V at revision 2.4. The name does not say what is inside, and the small size suggests a compact document set or a firmware or boardview file rather than a large schematic. Extract it first and check the contents. Whatever it holds, the revision matters, so compare the 2.4 marking against the PCB, since an F8V board at another revision may differ in layout, component values or firmware compatibility. No brand is given in the name.
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 @cyberlanelectonik. 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.