The videos and images you take with the ION360 U are saved under My Content within the app for iPhone users, and in the Gallery for Galaxy users, but stored on your phone. You can access them at any time by going to My Content, and the most recent videos and photos will display first. You can scroll through, view and post at any time from this view.
You can now export ION360 photos and videos to your iPhone's Photos library. Select "Photo Library" from the sharing menu and a copy will be stored to Photos. iOS won't show the content in a 360 view, but some services that support 360 viewing will retain the 360 format if you share from Photos.
The average size of a 360 photo is 1.5MG at 4K