folders.gs

    var folders = DriveApp.getFoldersByName("Università");
    var subfolder = null;
    if (folders.hasNext()) {
      var folder = folders.next();
      var subfolders = folder.getFoldersByName(Sbobine);
      var subfolder = null;
      if (folders.hasNext()) {
			var folder = folders.next();
			var subfolders = folder.getFoldersByName(5o Anno);
			var subfolder = null;
			if (folders.hasNext()) {
				var folder = folders.next();
   				var subfolders = folder.getFoldersByName(form.materia);
   				subfolder = subfolders.hasNext() ? subfolders.next() : folder.createFolder(form.materia);
    	}
    }
}