RAR archive for the Samsung SM-J500H, the Galaxy J5 variant of that model code, about 6.55 MB in size. Contents are not described in the name; such packages normally include schematic diagrams, board layout and troubleshooting guides drawn from Samsung service documentation. A technician relies on them to follow battery and charging lines, locate the PMIC, check for shorted capacitors and identify connector pinouts. Unpack with a RAR-compatible utility and match the board revision marking on the PCB to the documentation.
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 @tamirat_moobile. 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.