Hello, I took some 4K videos using my iPhone 6s+. When I launched Photos while having the phone connected to the Mac, I clicked on Photos on the top left. I saw some photos and videos. I could drag and drop photos to the desktop but I cannot do so with videos. The fan kicked in but no video shows up on the desktop. Could you please let me know how to solve this problem? After waiting for over 10 minutes, I see a white icon of the video on the desktop. It seems that it is copying but it just takes a very very long time to complete. How come it takes so long even I have a SSD on my MBP?