I keep my Lightroom Classic catalog on the hard drive of my Mac. I keep all the pictures on a 1TB external drive, which is almost full, with 860 gb used, so I wanted to create a second external drive with a new catalog. I didn't whether you use the same folder name for the media, so I just added a "Vol 2" at the end of the file name. I did something wrong, and now I can see the media on the original drive using Finder, but Lightroom says "file not found" when I pull it up in the Develop module and click on it. Every thumbnail shows a little exclamation point. How do I resynch the entire catalog?
thank you for your prompt reply, which quickly solved the problem. I'm a newbie on a Mac, and on Lightroom Classic. My 1TB external SSD was almost out of space, so when I set up the new SSD I gave it a new volume name. Whoops. I just changed the volume name back and everything was fine. And I'm a recently retired IT executive (EDS, HPES) of 32 years. I guess all that "important" stuff was purged from my cache when I retired. Thank you for your help.