ZIP archive of 8.20 MB carrying only the Samsung model code SM-G8870. Nothing in the name says what is inside, so extract it to see whether it contains schematics, PCB layouts or service documentation. Repair documents like these are used to trace power rails, find test points, check charging circuitry and narrow down the source of a short. Compare the model code on the device with the archive before applying any data, since related models may use other boards.
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 @esquematicosparatodos. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip