How do I backup the Photos Library so the folders remain organized in the external hard drive just like I have it in the Mac?
I read this question and almost replied, “That’s easy!” But the more I thought about it, the more I realized it’s an intricate question, because of how Apple has its own organizational structure that’s invisible in the Photos Library, independent of how you sort images in the Photos app. And because there are several possible answers to the same question.
The first question is, really, what is your ideal outcome for this copy on the external drive?
An exact duplicate of the library. Quit Photos, if it’s active, find the Photos Library, and copy it. The Library includes 100 percent of everything that Photos needs. Done. But that’s probably not what Peter was asking.
Read more here:: How to copy your Photos Library and keep its organization