How to compare two albums?

[CD.Graesser]

How can i compare  1700 filtered images (all from 2017 with star rating 4)
with  a folder/album  that contains  1500 images to find the missing ones
and copy only those.

The problem came up while i wanted to copy the 1700 filtered images into a
new album, but after 1500 image the harddrive was full and the copying
stopped. How do i know which are missing?

Thanks for the help

Christian
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