Archive of about 1.99 MB titled simply M1330, without brand, board number or revision in the name. Because the label is minimal, the exact device and board version cannot be confirmed from the name alone, and the contents should be reviewed after unpacking with WinRAR or 7-Zip. Repair archives like this typically carry a schematic set, sometimes with a boardview, which a technician uses to follow signal paths, check power sequencing and find test points. Verify the PCB marking matches before trusting any measurement values.
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 @generalschematics. 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.