QString download_location=QStandardPaths::writableLocation(QStandardPaths::DownloadLocation);  // this returns storage/emulated/... This also requires write external storage permission but the issue can be reproduced in other locations

#ifdef CONTENT_URI
filename=QFileDialog::getSaveFileName(this, "save", download_location); // will return "content://com.android.providers.downloads.documents/document/206"
#else
filename=download_location+"/settings.ini" // will return "/storage/emulated/0/Download/settings.ini"
#endif 

qDebug()<<filename; 
QSettings set(filename,QSettings::IniFormat, this); 
set.setValue("test",123); 
set.setValue("test2",456); 
set.sync();