ZIP archive of 4.74 MB labelled only with the Samsung model code SM-T210, a Galaxy Tab model number. The name does not say what the archive holds, so it may contain schematics, a service manual or other repair documents; inspect the contents after extracting. For tablet repair such material is used to trace charging and power circuits, read connector pinouts and find parts behind no-power faults. Confirm the model code on the device label matches before using any of it.
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.
Built-in OS tools7-Zip