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Terisa de Morgan - I have library A and library B, and both have a similar 'filepath/File Path' column. If I copy books from library A to library B the column 'filepath/File Path' values are retained if they're not empty, but they're empty the column in library B gets a path in the Temp directory.
@LadyKate - would your additional problem be related to this ==>
Bug #1641278 “Custom columns don't copy on create new library”
BR