Zip archive for the Quanta R62C board, 2.71 MB in size. The name does not list the contents, so it may hold a schematic, a boardview or other service material for this Quanta project, and checking inside before use is wise. R62C appears to be a variant within the R62 family, and variants of one project can differ in parts and options. Quanta project codes like this are printed on the board silkscreen, so match the exact code and revision before using any drawing to trace rails, signals or short circuits.
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 @notebookschematic. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.