Compact 134 KB RAR archive tied to the ASUS X550WE board, revision 1.3. The file name gives no hint of the exact content, which at this size is more likely documentation, such as a schematic or boardview, than a firmware image. Extract it and check what it contains. Revision 1.3 boards can differ from later 2.0 versions in layout and component placement, so compare the revision marked on the mainboard first. Use the material to locate parts, measure rails and trace signal paths during repair.
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 @schematicslaptop. 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.