RAR archive for the Samsung Galaxy A3 2016, model SM-A310F. The name says nothing about the contents, which could be a schematic, layout, service files or firmware, so open it to check before relying on it. Service material for this phone is typically used to trace charging, power and display circuits or to restore software on a dead unit. Make sure the model code matches your device exactly, since regional variants of the A310 can differ in hardware and firmware.
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 @Schematics_Mobile. 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.