The storage location of externally stored worlds/etc was recently changed. That location however is inaccessible on recent versions of android. The only advice here is how to load existing worlds back into minecraft. However, this excludes consideration of accessing the data storage location to get the data for other purposes, such as making copies of world data either as a back up or to share with friends. I am unable to even see that data without extreme dedication of which most options require either root or an external computer (which I don't have), and those few options to see the data in the new folder are read only, meaning that moving and copying worlds/shaders/etc is now a highly complicated and difficult affair, all of which can be solved by simply reverting back to the older storage location which is easily accessible without third-party apps, root access, nor desktop/laptop computers. The strength of minecraft is player access and manipulation. That should not be hindered at all, as that is the core of minecraft's popularity.