ZIP archive of 2.30 MB labelled for the Xiaomi Mi A3, written in the name as Mia3. The name does not reveal what the archive contains, so it could hold schematics, a boardview, service documents or firmware; open it and check the files before planning a repair. Repair data for a phone like this is normally used to trace power and charging circuits, locate components and test points and identify connector pinouts. Make sure any board revision noted inside matches the markings on the mainboard of your handset.
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 @tamirat_moobile. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.