Firmware backup archive whose name refers only to X200s, which most likely points to a ThinkPad X200s, although the archive carries no brand, board number or version. At 2.92 MB it may hold a full SPI flash image or several dumps, so open the RAR and check the file sizes before anything else. Such backups are written to the BIOS chip with a programmer to revive a board after a failed update. Verify the contents against your own chip size and keep a read of the original 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 @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 →