ZIP archive of 17.4 MB named Mfit 21, which most likely refers to the Intel Flash Image Tool (MFIT) from the CSME version 21 system tools. The name gives no laptop model or board, so no device link can be assumed. Technicians use FIT tools to open a full SPI image, view and edit the descriptor and ME regions, and rebuild a clean image after replacing the BIOS region. Use the tool version that matches the ME firmware generation on the target board.
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 @skclappybios. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →