Android APIv29 FileNotFoundException EACCES (Permission denied)

When your app targets Build.VERSION_CODES.Q, the path returned from this method is no longer directly accessible to apps.

    val path = getExternalFilesDir(Environment.DIRECTORY_PICTURES.toString() + 
    File.separator + "Output Folder")
    val file = File(getExternalFilesDir(null), "filename.jpg")

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Starting with Android 11 the storage permission is getting revoked and developers would need to consider alternative ways of accessing the storage they need either through SAF or Media Store. For the time being, you can carry on using what you’re using by adding the following in your manifest within the application tags:

android:requestLegacyExternalStorage="true"

You might want to consider changing your minSDK to 19 and use getExternalFilesDir() to get a path that doesn’t require any permissions.