If you use iMove 11 for editing video and have filled your internal hard disk you may want to use an external disk. If you have an Airport Extreme Base Station you can connect an external disk which is then known as an Air Disk.
However, by default iMovie will not let you use a networked disk such as an Air Disk. This can be enabled through using a terminal command:
defaults write -app iMovie allowNV -bool true
