problem copying photolibrary to external driveSays it can't continue
I want to back up my photo library from my iMac to an external drive. It is large about 200GB but there is sufficient space on the external drive. It started copying for about an hour, then I got a message that it cannot continue because there is a duplicate in the file (this is photolibrary.library ), then it quit. Why didn't it ask if I want to ignore or replace the duplicate?
How do I get by this problem?
iMac Pro