Archive carrying board number 10210-1, about 105 KB, with no brand or model given. The format matches Wistron numbering, a five-digit project code with a dash revision, and it appears close to the 10211-1 board in the same set. What exactly is inside is not stated, so extract and check whether it is a boardview or other data. Before relying on it for tracing rails or locating parts, confirm the number silkscreened on your board reads 10210-1.
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 @schematicslaptop. 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)