I'm in the process of putting all of my iMovie '08 files onto external disks to save space on my iMac. I'm using 2 750GB iomega Ultramax Hard Drives (FW800,400, USB 2.0, eSATA). I'd like to make sure that all of my external data is redundant, but am unsure about the best way to proceed with this. Any suggestions or benefits/negatives with each option would be helpful. Thanks! Choice #1) Set up the two drives as a RAID 1 grouping through OSX Disk Utility. Save files to the disk set. Choice #2) Set up the 2nd drive to backup the 1st drive daily (or weekly) with Carbon Clone Copier. Save files to first drive only.