Small 256 KB binary labelled z530n, probably a Lenovo Z530-series image, though the name states no brand or board number. A dump this size is far too small for a full system BIOS and is typically the contents of a secondary flash such as the embedded controller or keyboard controller chip. Check the part number of the small SPI chip on the board to confirm its capacity matches 256 KB. Save the original contents before writing and use this image together with the matching main BIOS read.
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 @biosbigarchives. 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 →