Archive in RAR format, about 392 KB, for the Z97-K motherboard. No revision or contents are stated in the name, so it has to be extracted to see whether it holds a boardview, a schematic or other repair documents. A separate Z97-K archive marked R2.0 also exists, which suggests this one may cover another board revision, so compare the revision in the files with the one printed on your PCB. Extracted boardviews open in OpenBoardView or FlexBV for locating parts, following rails and finding test points.
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 @boardview. 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.