Hi did you had a chance to test on the “Google Play” side if it is working without extra permissions?
as per 4.21, the save slot file is in the PrivateStorage of the app so it should not required extra permissions.
I opened a case on this. I will update here if I have a feedback.
As of today, I had to put the ExternalFileDir option to true in order to not block my development process, but I won’t publish my game with this option set to true
Thanks!