Archive for the Lenovo ThinkCentre M700 Tiny, marked 6th generation and tested OK, a 9.26 MB RAR that most likely contains a BIOS image for the Skylake-era mini desktop. No board number is given, so confirm your unit matches the M700 Tiny before relying on it. Such images are written to the SPI flash with an external programmer and a clip or after removing the chip. Always back up the original contents, which hold serial and system data, and ensure the image size matches the chip capacity.
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 @hrtechno. 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.