Boardview for the H410M S2 V2 motherboard, revision 1.01 as suggested by the -101 suffix, packed in a RAR archive of about 511 KB. The name marks the contents as a BDV-format boardview. Such a file shows component outlines, part designators, net names and pin connections, so you can locate test points, follow rails and narrow down shorts without a schematic. Open it in a viewer that supports BDV, such as OpenBoardView or a commercial boardview tool, and confirm the board revision printed on the PCB first.
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 @pkbiosbdv. 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.