RAR archive of 7.29 MB for a board identified as ZK-H670-I5, with an Intel Core i5-1235U processor noted in the name. It most likely holds BIOS firmware for a mini PC or generic board, though the brand and device are not stated. Check the board silkscreen and CPU before use. Confirm the image size matches the flash chip, and back up the original SPI contents with a programmer before writing anything.
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 @biositechyangiyer. 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.
7-ZipWinRARThe Unarchiver (macOS)