Question by CoopOwnz · Feb 26, 2017 at 05:15 PM · android save data storage persistentdatapath

Android PersistentDataPath UnauthorizedAccessException

I can't find a good explanation for how to resolve this issue. It seems like certain users are installing my application on their external storage. The PersistentDataPath returned for that is a location in their external storage in which my application does not have Write permissions.

UnauthorizedAccessException: Access to the path "/storage/sdcard1/Android/data/blackjack.allin1.com/files/bj_allin1_data.dat" is denied.

 FileStream file;
         if (File.Exists(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat"))
         {
             file = File.Open(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat", FileMode.Open);
         }
         else
         {
             file = File.Create(Application.persistentDataPath + Path.DirectorySeparatorChar + "bj_allin1_data.dat");
         }

My settings are:

Install location: Prefer External, Write Permission: Internal

Since only a small number of devices install the app on external storage I would rather not ask for permissions to write external. Is there a solution to continue to write internal even if the app is installed external? Alternatively, can I only ask permissions to write external on those devices that install at external storage? What is the proper solution for this issue? Thanks

EDIT: If I change Write Permission to external will this ask all users for permission to access external?

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