If you already have your photos organized into folders and subfolders on your hard drive, you can save yourself a lot of time by importing multiple folders into Aperture at once. Aperture will even preserve the folder hierarchy you’ve created, so that everything stays organized.

1. In the Projects pane, click the Library icon.
2. From the File menu, choose Import > Folders as Projects.
3. An Import dialog appears. Select the folder you want to import into Aperture. You can Command-click to select multiple folders. Each folder you select will become a project in Aperture. If the folders you select contain subfolders of photos, those will be imported too.
4. Use the Store Files pop-up menu to determine where you want Aperture to put your imported photos. Choose “in their current location” if you don’t want Aperture to duplicate your photos. With this option, your image files stay where they are and Aperture simply references them — saving you disk space. If you choose “in the Aperture Library,” your photos will be copied (duplicated) when imported.