To save a copy of all of your media and the project onto a USB or Hard Drive, there are a couple of steps:
- Select your library in the sidebar. 
 - Go to File>Consolidate Event Media, click OK [this will save all your clips and anything else you’ve added to your project]
 - Go to Finder and find the library you created, then copy and paste to your USB
 - If you didn’t create your own library, do the above and then:
 - Select your video in the sidebar. 
 - Click File>Copy Event to Library>New Library, choose where to save the backup, name it, then Save.