It depends on the size of the current firmware version. Before updating the firmware, it is recommended to have a reserve of 6 GB in the DJI RC Pro. The DJI RC Pro firmware update involves firmware in the aircraft and the DJI RC Pro remote controller. Generally, 2-3 GB is required. ...
However, depending on which controller you purchased, you may not need to download the app at all. The DJI RC 2 and RC Pro have built-in screens and do not require a smartphone to operate. These controllers come with the DJI Fly app pre-installed. Just be sure to power up the control...
This guide assumes you were already on firmware 1.5 - The update process is EXACTLY the same even if yuo wre not on 1.5 and can still be followed. DJI have released an important battery firmware update v1.6.0040 for the Phantom 3 Pro and Advanced. It is seriously advisable to apply this...