I exported (to a portable drive) a collection as a catalog.
Took this new catalog to school to work on the images.
Having finished working on the exported catalog, I now want to move or merge the catalog I took to school back into my master catalog on my workstation at home. Question - how do I merge from the portable drive containing the same files as are on the home workstation and keep the edits I did at school?
Here is the article that would be beneficial for you to merge two catalogs :