Hello -- I have a new iMac with Big Sur. I am using an EHD to store photos. I create LR catalogs in LR classic for each year. I am trying to import photos into my 2019 LR catalog from a folder of about 500 photos from the EHD. From within LR, I click on import, navigate to the photos on the EHD, check all, click done. The little import photos long rectangular box top left pops up briefly, then shuts, and no photos are imported. i have tried copy as DNG, copy, and add (the only option I haven't tried is move, because I don't actually want to move the photos from the existing folder). I was previously able to import this way many times from other folders and into other catalogs, but am unable to import now. I tried selecting all of the photos and dragging them into LR, same result. I am wondering if it has to do with the latest Big Sur update. Any suggestions on another way to import? TIA for any help.