I've linked iTunes and Lightroom to a "my stuff" storage drive, separate from the startup disk, which I back up twice...once to an external drive and also to another external drive which I take off site and bring back for a monthly backup. I'd like to treat my email the same way as my photos and music, but I don't see an option to tell Mail where to store my mail. Is there a way to make it write to an external drive instead of the user folder? Obviously I could drag the entire mail folder onto the external drive, but that would defeat the purpose of using SuperDuper to automatically clone my storage drive. Thanks.