Updated Minecraft Bedrock addition and cannot play any old worlds now. This tablet is storing new worlds in Android/data/com.mojang.minecraftpe/files/games/com.mojang/minecraftWorlds/ the old worlds cannot be located in any of the file folders. 

We have an identical tablet that saved its old worlds in games/com.mojang/minecraftWorlds/ but this tablet did not have a games folder at all. There was no games folder prior to or after the update. Prior to the update it ran the worlds fine despite not being able to locate the games folder.