Raw 32 MB binary named lock.bin for a Lenovo laptop on LCFC motherboard NM-B931. The name suggests a locked image, perhaps with a password or security lock set, but it is not clearly a clean dump. LCFC is Lenovo's ODM, and NM-prefixed numbers mark its boards. Use the file only after comparing it with a dump read from your own SPI chip. Keep a backup of the original, and check that the chip size is 32 MB before programming.
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 @zinfoservicebios. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →