Tiny RAR archive of just 1.05 KB for board 08628-1, a number in the Wistron numbering scheme. The size is far too small for a schematic or boardview, so it is likely a note, placeholder or damaged upload; a 46.6 KB copy with the same number is also available and is the better choice. No brand or model is stated. Extract it to see what it holds, and always confirm the board number on the PCB before using any related document.
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.
7-ZipWinRARThe Unarchiver (macOS)