Large RAR archive, roughly 35.7 MB, named for an AH16 main board with a VB suffix. The name does not state the brand, revision or what the archive holds, so the contents should be checked after extraction; the size suggests schematics, boardview or firmware files bundled together. Such packages are used to trace circuits, find components and test points, or reflash the BIOS chip. Compare the board code and revision silkscreened on the PCB with the files inside before relying on any of them.
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 @boardsscanrepo. 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.