I flew it a couple (or maybe 3) years ago and put it up in "storage" and today when I got it out to fly qgtqin, charg4d everything, I had nothing but trouble - mostly because the app could find the remote controller (to link and to upload firmware). It refuses to connect to the aircraft and from what AI can tell it is because it needs firmware update (but not certain). And DJI seems to have no trouble shooting procedures any more (maybe they never did).