A 4 MB BIOS image for the Lenovo IdeaPad Z500, marked OK in the name, indicating the dump was reported working. The 4 MB size corresponds to a 32 Mbit SPI flash chip; some Z500 boards also have a second chip, so check which one this image belongs to. Program it with an external programmer such as a CH341A after reading and saving the original contents. Confirm the board revision and chip capacity on your unit before writing to avoid a mismatch.
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 .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 →