Microsoft archive named 1979 Wayland, revision 3.0. The 1979 number likely refers to a Surface model number and Wayland to an internal project name, but the name does not say what files are inside. At 26.5 MB it could contain schematics, boardview data or firmware. Extract and review the contents before use, and confirm the revision on the device board matches 3.0. For any firmware included, keep a backup of the original chip before programming, as Surface boards often store device-specific data.
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 @boardsscanrepo. 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.