Small RAR archive, 360 KB, named as a Lenovo BIOS extractor, which is most likely a utility for unpacking Lenovo BIOS update packages rather than a firmware dump itself. Tools of this type pull the raw image out of vendor update executables so it can be written to an SPI flash chip with a programmer. The name gives no version or supported models. Check that the extracted image size matches the target chip, and back up the original chip before writing anything.
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 @CLRINDORE. 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 →