I use an Iphone 6S to run my Mavic, the memory occupied by the App DGI Go 4 is increasing with every flight.
I suppose the space is being occupied by the Flight record (map and detail of the fight record), my questions:

• I can sync my flight records to the Cloud, where can I access them from a PC or iMac afterwards?
• When, after sync, I press "Clear Local flight records" but it does not free space on the iphone app, only if I delete and re-install it, what am I doing wrong?
  

I guess some video are stored in your ip6s

What Steven said. The GO app stores cached video and photos files on your device, you can go and delete them from your videos if you need to clear up space. The flight records don't really take up much space.