Small RAR archive of 114 KB labeled U5502 1M, most likely a firmware dump for the chip at location U5502 with a 1M capacity, though no device or board is named. The tiny size fits an EC or small SPI image rather than a full BIOS. Without the model you must confirm it belongs to your board before use. Read and keep a backup of the original chip, and check that the image size matches the chip capacity exactly before programming with an SPI programmer.
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 @vinafix_bios. 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)