Computer Digital File Management
Picture and Video File Back Up
Choose your external drive and the new folder that you created inside that drive.
That's it, you have backed up your photos and they can be moved to any computer or chosen destination.
To do this, open iMovie, click on the project, then select "Share."
You will then be asked where to export the movie.
Assuming that you created a movie folder in your external drive, you can choose the external drive and your newly created Movie Folder. Then click SAVE.
To find these files, open Finder and look for the Movie folder in the finder menu.
Just follow the "Uploading files to Google Drive" directions and choose your Movie folder to locate the video for upload.