A tiny plain-text note of only 55 bytes whose name, link.txt, reveals nothing about any device, board or firmware. At that size it most likely holds a single web address or a short reference line rather than repair data. Open it in any text editor such as Notepad to see what it points to. It contains no schematic, boardview or BIOS content, so a technician should not expect circuit details or flashable data here and should treat it only as a pointer to a separate resource that must be verified independently.
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 @biosarchive. Enginerys does not host this file.