A boardview (component placement) file for Lenovo hardware (board NM-B711). Shared as “EA481 NM B711 (REV 1.0) (2018 04 09) BDV.rar” — a .rar file, 1.47 MB.
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 @ShareMan_Electronic_Files. 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)