issue importing photos then adding to external drive
Hi,
I've been using the following system for years, without any issues;
If I'm sent a photo online (via email or social media etc) I download it & add it to a folder on my desktop. Then every few weeks I'll drag that folder to 'photos' & import new items. I then close Photos & delete the photos from the desktop folder. When I'm backing up to external drives, I simply drag the folder in Photos with the new images in to the drive.
However, for the first time, without me changing anything on my mac (M1) or elsewhere when I try to drag the folder in Photos with some recent downloaded photos in to my drive it says the originals are missing & it can't export them.
Any ideas what's caused this?
Thanks.