Backing Up Entourage Archives on a Mac
If you use Entourage and backup your email locally on your computer you will need to make sure you have a copy of this content stored on the device you are using to migrate your archived email content. To do this please complete the following steps:
Click on the File menu within Entourage and select Export.
Next you will follow a series of steps that will require you to designate what you would like exported.
Next you will be asked if you want to delete content.
You can then select where you want the content stored for your backup. Designate where you are storing this content and save. Entourage files are .rge files.