Can't import photos to Mac from iPhone
I have a new MacBook Pro 16" and I have used it to open my older Photos file. It took ages but eventually it has opened it and I can see everything fine.
When I plug my iPhone 7+ in it recognises it, and it brings up all the photos on it. But when I click Import etc it seems to recognise the action but nothing happens. No photos are imported or deleted from the phone.
I tried using Image Capture to extract the photos from my iPhone to the Mac and that worked ok. Then I tried to import that folder using Photos but it still wouldn't bring anything in.
Bit of background. My Photos file is sitting on an Apple Airport Time Capsule and there's only 2GB space left on it. Would this be causing an issue? The 2TB storage is mostly taken up with backups of the Mac. How can I delete some of these as I don't need to keep so many or such a history.
MacBook Pro 16″, macOS 10.15