ZIP archive of 4.01 MB for the Samsung Galaxy A7 2017, model code A720F. The name does not say what is inside, but repair archives of this kind normally carry schematics, board layout pages or service manual sections for that handset. Unpack it and check the contents with a PDF viewer. Such material helps when tracing a short on the main power line, locating connectors and test points, or following charging and display circuits. Confirm the phone really is an A720F variant, since other A7 years use different 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 @esquematicosdecelulares. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.