Zip archive of 2.04 MB for the Huawei G620s, variant U00. Huawei suffixes such as U00 indicate the regional or network version, and hardware can differ between variants, so confirm the exact model on the device. The contents are not named, but files like this typically contain schematic diagrams or board layout drawings. Technicians use them to follow supply rails, locate the charging IC and connectors, find test points and identify components when diagnosing no-power, charging or short-circuit faults on the mainboard.
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.