by Julieanne Kost
I often download files into a folder, import them into Lightroom and then find that I have additional files to add to that folder. When this happens, I simply copy the additional files into that folder using the operating system. Then, in Lightroom, I Control -click (Mac) | Right Mouse -click (Win) on the folder in the Folder panel and choose Synchronize Folder (or choose Library > Synchronize Folder). In the Synchronize folder dialog, you can choose to display the import dialog to add additional metadata or toggle it off and add any necessary metadata in the Library module.