Second volume of a RAR archive with Android scatter firmware for model A326U on the MediaTek MT6853 platform. The name gives no build number, bootloader revision or Android version, so those must be checked inside the package. Scatter files define the partition layout that SP Flash Tool and service boxes use to reflash the device. This part must be extracted together with part 1. Before writing, compare the build with the phone, because a lower binary revision than the one installed will be refused.
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 @mrepairo. 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.