An 8.67 MB RAR archive named after the model code G970F, with no further detail on what it contains; it may hold schematics, a boardview, parts lists or firmware, and should be examined before relying on it. Phone repair documents of this kind help a technician follow power rails from the PMIC, find filter capacitors and test points, and isolate shorted components on the main board. Always compare the model code on the handset itself with G970F, because carrier and regional versions can 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 @SMART_PHONE_SCHEMATICS. 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.