Hello, After upgrading, I moved the game files to a new external storage directory (android/data/com.mojang.minecraftpe/files/games), And I changed it to external storage in the game.But after I opened the game, all my saved files disappeared (it was created in an old version).After testing, at least all versions after 26.0 have this bug.
I am unable to provide images as I have already deleted the previous ones.
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Please do not duplicate your own report MCPE-235905
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