Lenovo firmware archive for a board identified as 1702B, revision 05_01 at the SVT build stage, with the flash part given as 25064PP, which suggests a 64 Mbit (8MB) SPI device. The RAR is 4.72 MB. The name gives no laptop or desktop model, so identify the board by its PCB marking before use. Such dumps are written with an SPI programmer to revive a board that no longer boots. Keep a backup of the original chip, and verify capacity and part number of the flash fitted on your 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 @biosarchive. 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.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →