Small RAR archive, 248 KB, named R7000L-64TC. The name gives a model-style code and a 64TC suffix but no brand, board number or document type. The precise meaning of the suffix is not stated, so treat it as an identifier to match against labels on the device. Open the archive with 7-Zip or WinRAR and check whether it holds a firmware image or documentation. If it is a dump, confirm the target chip capacity and keep a backup of the original contents before programming anything.
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.