One more question on a different topic. I'm trying to figure out the easiest and least expensive way to create a backup for the dual drive imac. I used SuperDuper to back up my previous computer to a 500GB external. So could I use the 500 GB for the SSD and purchase an additional 2TB drive to back up the HDD? Or is there a single external drive solution? I was looking at 4TB drives, but would I need to partition the drive?