Small RAR archive, 8.44 KB, holding RPMB data for a device coded M013F, which matches Samsung Galaxy M01 Core naming. RPMB is the Replay Protected Memory Block of the eMMC or UFS storage, where security and lock information is kept, and these files are used by repair boxes and programmers when restoring or repairing a board after memory work. Use them only with the exact model they were made for, and save the original RPMB and full memory content of the phone before writing anything.
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 @uzb4422. 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.