Go to Settings, General, iPhone Storage, DJI Go 4 and see how much is being stored in the Documents and Data.  I had over 6.5GB and that was after deleting all my photos and videos in the Go 4 Editor.  My cache was clear, too.  DJI Gamora recommended I sync in Flight Records and then remove/replace the Go 4 app.  Once I did that I freed up 6.0GB of space in my phone.  That's a lot of space for more pics and videos as I go to Yellowstone National Park and Custer State Park in two weeks!!!  I still show all my Growth of Value points, footprints, max distance/altitude/speed and all my flights are still in my Flight List.  Don't know what was in that 6GB but I'm not missing anything, yet!!!

Go to Settings, General, iPhone Storage, DJI Go 4 and see how much is being stored in the Documents and Data.  I had over 6.5GB and that was after deleting all my photos and videos in the Go 4 Editor.  My cache was clear, too.  DJI Gamora recommended I sync in Flight Records and then remove/replace the Go 4 app.  Once I did that I freed up 6.0GB of space in my phone.  That's a lot of space for more pics and videos as I go to Yellowstone National Park and Custer State Park in two weeks!!!  I still show all my Growth of Value points, footprints, max distance/altitude/speed and all my flights are still in my Flight List.  Don't know what was in that 6GB but I'm not missing anything, yet!!!