BIOS archive in RAR form for what the name calls a Sony model PCG-71211W with an Intel Core i3, the brand spelled SONGY by mistake, plus the token N50 whose meaning is unclear. PCG numbers are Sony VAIO model codes found on the bottom label. At about 1.08 MB it likely holds a dump for reprogramming the flash with a programmer. Check the label and the MBX board number on the PCB against your unit, confirm the image size matches the chip, and keep a backup of the original contents.
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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →