has anyone had any issues w/ using the N/file module when setting the folder of an existing file? I load a file using file.load, process it and then when i'm done I move (try to at least) that file into another folder by using <file_obj>.folder = <new folder id> and then <file_obj>.save() and the file never moves

If have not experienced this before, but as often with NS something that you think would naturally work doesn't. As a work around, can you not create a new file with the same content, set the new folder, save that one and then delete the old one?