My minecraft world does not appear in minecraftWorlds folder

I have a world in Minecraft for Android. But when I try to acces the minecraft folders to make a backup I can´t found my world, I've saved my world in application. There isn't an old folder (games in storage) just the new folder(com.mojang in Data/Android). In the new folder there is just two folders: minecraftWorlds and world_templates, both are empty, THEY ARE EMPTY BUT I HAVE A WORLD AND I CAN'T FIND IT, pls help me I want to make a backup to don't lose my world.