RAR archive of 2.74 MB labelled SVOD3 version 1.0.5.2, with no brand, model or board number in the name. Its exact contents are unclear from the label alone, though the version string suggests a software tool or reference collection rather than a single firmware dump. Extract it and inspect the contents before use, checking any executables with antivirus software. If it turns out to contain firmware, the usual rules apply: match it to the board, back up the original chip, and confirm the image size before flashing.
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 @BiosSchematicBoardviewNoLimit. 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.