Small schematic archive, 556 KB zipped, labelled A720F, which corresponds to the Samsung Galaxy A7 (2017) model code; the file details carry no brand. Technicians use such diagrams to follow battery and USB charging lines, PMIC rails and display connector signals and to pick measurement points. At this size the archive probably holds only selected pages or block diagrams rather than a full service manual. Compare the board markings with the document before relying on any component values.
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 @phoneSchematics. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.