I don't want to put a lot of strain on my local drive and I've got a lot of apps and I use all of them at some point or another. I have an ext hd that I want my laptop to backup to, and I'm aware that I will not be able to view a lot of files when the hd is disconnected but I need the space.

If some of you could give me a how-to to backup Ilife programs data to my ext hd it would be greatly appreciated. I already have a lot of Ilife apps with data in them so I would need to know how to back up those to a folder on my hd and still have the application notice them.