Unable to Upload to iCloud
1) When i connect my iPhone 12 pro to my iMac (MacOS High Sierra, version 10.13.6-mid 2011) only some of my phone photos goes to Photos and I don't know what's wrong or what I need to do...
2) Just today I clicked on the side bar of Photos the tab labeled Unable to Upload and was shocked to see that numerous photos and videos were there! Unable to Upload to iCloud since January 2023!
3) Also, a dropbox sign comes up on my photos asking me to back up my pictures and I don't want that. I want them backed up on my iCloud.
4) How can I add a .mov file to my photo library that was copied for me on a flash drive since AirDrop did't work.
Thank you for any responses!
iMac 21.5″, macOS 10.13