I picked up a 3tb usb drive and moved my photos from the usb drive I was using before..to the new one, but I didn't use LR to do it.
Now when I go to those years in the catalogue, the lisings are greyed out and have the question mark so I select 'Find missing ..." and navigate to the new drive and click 'select folder'. The problem is LR then tells me the photos already exist in the catalogue and it asks me if I want to merge them. I'm not sure how I should answer that.
Advice appreciated as always.