Archive carrying only the model token ux510u, most likely for an ASUS ZenBook UX510U series notebook, with no brand, board number or revision stated in the name. At 978 KB the package may include a schematic, boardview or both, so open it to see what is there. Such repair files are used for tracing power rails, checking which component is shorted and finding measurement points. Match the 60NB board number and revision printed on the mainboard against the documents before working from them.
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 @notebookschematic. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.