Hi léonie,
Thanks for jumping in. It is connected with a USB-C cable, the one that came with the new drives. I just erased and re-formatted one of the new LaCie drives to APFS and copied the correct Photos Library over to it, but nothing else. Photos is the only thing on it. There is also no Time Machine on this new drive so the "Ignore Ownership" is checked.
Now, Photos opens right up from that drive, but what's really weird is that the videos recorded before 2022 stop playing back. Everything recorded since early 2022 then plays back fine, no matter how long or short the vid is. Also, when I try to "edit" the pre-2022 videos in Quicktime, it gives me the message in the attached screenshot, and opens a Finder window to locate it. But when I search for the video by its name, the system can't find it anywhere. It's like the videos before Jan. 2022 were all replaced by a snapshot. This is copied from the original Library which I can still open on my older Mac OS Extended (Journaled) drive on which all videos will play. Right now the drives are ALL going through an OWC hub to my Mac mini m2. So even the older drive is playing everything on this set up. It's the new drives that are not playing them, or even finding them.
Any ideas?
Jon
