RAR archive for the QD-R62 motherboard, where the MB-E suffix likely indicates revision E, 2.64 MB in size. The name does not specify whether it holds a schematic, a boardview or both, so extract it and check. At this size a schematic PDF is plausible, useful for tracing power rails, enable signals and charger circuitry. Before relying on component references or values, make sure the board number and revision printed on your PCB correspond to this package.
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 @cyberlanelectonik. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
7-ZipWinRARThe Unarchiver (macOS)