RAR package of 264 KB for the ASUS F1A55-M LK motherboard, an AMD A55 micro-ATX board. The file name states only the model, so the archive must be opened to confirm whether it holds a BIOS image or other service material. Firmware for this board is typically written to an SPI flash chip with a programmer when recovering from a bad update. Read and keep the original contents first, and check the model marked on the board matches LK exactly.
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 @boardview. 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)