Compressed archive of 715 KB titled S7-301u, a Huawei MediaPad model code, although no brand is given in the listing. The file name does not reveal whether a schematic, boardview or service notes are inside, so extract it and review the contents first. Tablet repair documents of this sort are used to trace supply rails, check the charging and USB circuit, and find components around the display connector. Verify the main board marking and revision against the drawings before taking measurements or replacing parts.
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.