Samsung package for model SM-T357, a Galaxy Tab A 8.0 variant, in a 2.78 MB zip. Only the model code appears in the name, so extract it to see whether it contains schematics, layout drawings or other service documents. Material of this type helps locate the charging circuit, PMIC outputs, connectors and test points, and supports diagnosing shorts or no-power faults on the tablet board. Samsung model suffixes distinguish regional and network versions, so compare the code on the back cover or settings menu before relying on 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.