ZIP archive of 6.61 MB labelled M1721 and M6 Note, which points to the Meizu M6 Note smartphone, M1721 being its model code. The name does not say whether it holds schematics, boardview or firmware, so open it and inspect the files before relying on it. Repair material of this kind is used to trace supply rails, read component designators, and locate test points when chasing shorts or charging faults. Verify the model code on the device and the PCB markings against what the documents show.
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.