I moved some archived images from one external drive to another. My Lightroom catalog is not showing all of the folders from the new external. These folders were present from the old external drive. The images are indeed on the new external drive, but not showing up in Lightroom catalog. It has some of the folders, but not all. Any advice? I'm on a Mac OS X and Lightroom 4.4. Thanks in advance.
In the Folders panel, make sure you have "found" any missing "?" folders. "Update folder location" as needed.
Right-click and "show parent" as needed if your Folder tree does not look like what it does in Finder.