RAR archive for the Samsung SM-M325F, part of the Galaxy M32 line. The sm in the name most likely means service manual, though the exact contents are not stated and should be checked after extraction. Samsung service packs commonly bundle schematics, board layout views, troubleshooting flows and part lists that help locate components and test points. Extract it with WinRAR, 7-Zip or a similar tool, then open the documents in a PDF viewer. Match the board revision on the PCB to the drawings before relying on measurements.
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 @uzb4422. 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.