Small 134 KB RAR archive for the ASUS X555LD, with 2.0 most likely the mainboard revision. The name does not say what is inside; for ASUS boards a file this size often holds a boardview or similar repair data, so extract it to check. Such material helps with locating parts, tracing power rails and finding test points while diagnosing shorts or no-power faults. Check the revision printed on the PCB against 2.0 before relying on part positions, since ASUS changed layouts between revisions of this family.
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.