Samsung SM_J700 documentation bundle, referring to the Galaxy J7 model family, compressed as a 9.15 MB RAR file. The name does not specify a regional suffix or the files inside, so check whether it covers your exact variant such as J700F or J700H. Packages like this usually contain the schematic, layout and troubleshooting sections of the service manual, used to trace rails, locate components and diagnose power or charging faults. Verify the PCB revision marking against the drawings before soldering.
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.