I am moving photos from my iPhone via File>import in Photos with a cable connection. What would be better? I am not using iCloud Photos since I have a very large photo library of 70,000 photos. I am currently backing up my photo library to a hard drive. I have so many photos partly because my Mac was the iTunes Mac (during the iTunes days) for my family of 5 and everyone used my computer to back up their iPhones including all their photos every time. As a result, I have lots of duplicates and bad photos, taken by my children, which they have confirmed, they no longer want now there are in their 20s. Many of these photos are goofy, shaky, upside down photos that can easily be eliminated. As I worked through my Photo library, that is what has lead me to discover this issue of having multiples of the same photo in both the jpeg format and HEIC format.