I'm migrating to a new Mac and am confused about how to move my Photos Library. On my old Mac, I kept the Photos Library on an external drive, but my main Photos folder on my internal drive has its own icon for the Photos Library. When I ran Migration Assistant, the "Photos Library" icon appears in the Photos Library, but I cannot see my photos unless I connect the external drive to the new computer. If I want to move the Photos Library to the new Mac, do I simply copy it to the Photos folder and, if so, does this wipe out the icon that's already there?