Boardview for an H61M-K motherboard, revision 1.02, in a 135 KB RAR; the FZ tag likely refers to the .fz boardview format. Such files open in viewers like OpenBoardView or FlexBV and show component positions, part names and the nets each pin connects to. Use it to find test points, follow a rail from the VRM to the socket, or locate the source of a short. Check that the PCB is revision 1.02, as placement can differ between board revisions.
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.
7-ZipWinRARThe Unarchiver (macOS)