RAR archive of 1.34 MB named for the Redmi Note 7, a Xiaomi phone, with no detail on whether it holds a schematic, layout or firmware data. Extract it to identify the contents before working with it. Diagrams for this model help trace rails from the battery connector, inspect charging and USB circuits, and locate components on the board. If the archive is a firmware file, back up the original partitions first and confirm the variant, since the Note 7 family includes Pro and regional versions not compatible with each other.
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.