how do I save a file in Android outside the app sandbox?
Firstly, you cannot save files in the external storage, it is related to Storage updates in Android 11, this update comes from native android's design.
1.Declare the MANAGE_EXTERNAL_STORAGE permission in the manifest.
2.Use the ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION intent action to direct users to a system settings page where they can enable the following option for your app: Allow access to manage all files.
After that, you can save it in
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