TheLastWarriorSC72

This is best done with Astro file manager, but if your device came ipre-installed with File manager that also works.  Download the map file.  Open your file manager and go to downloads and find it.  Cut it and move it to the minecraft worlds folder.  That is under internal memory, games, com.mojang. and that is where it is.  paste it in the folder then select it again and hit extract.  After that is done open mcpe and it should be in there!