ZIP archive of 14.8 MB for the Samsung J700F, written in lowercase in the name. What exactly the archive holds is not stated, so open it to see whether it contains schematics, a boardview, service manual pages or firmware files. The F suffix designates one regional version of the model, and variants with other suffixes may differ in hardware, so match the code from your device label. Such repair material is used to trace supply rails, find test points, check charging and display circuits and identify components on the mainboard.
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 .zip file
Compressed archive that every operating system opens without extra software.