Since the file was not generated by your app you will probably have to use the SAF extension to get the file in the app's ASD. Possibly this example Copy file to ASD with SAF - Error - #5 by Frank-HRO
Since the file was not generated by your app you will probably have to use the SAF extension to get the file in the app's ASD. Possibly this example Copy file to ASD with SAF - Error - #5 by Frank-HRO