I recently upgraded from aniPhone 7 plus to an 11 Pro MAx. All my data was on iCloud which transferred to the new phone, or so I thought. When I look at the 8000 or so photos and videos, some appear to be on my new phone and open up immediately, some I get a message that the phone needs to download the file first before it opens.
I want to make sure that all my data is residing locally on my new iPhone. How do I accomplish this?