i have received an official email reply by dji to confirm its just backup to their cloud service so when i use other device, they will all be synced. they will consider uploading the photos taken during flights to skypixel.com they said.
"If you are using iOS can you go to Advanced and click on download the flight data. You will need to be connected to a PC or Mac via the usb on the back of the Inspire and a folder will appear. You will need to copy the last flight data file to your computer. It will be large if it is a valid file."