Paranoid about data loss?

I think maybe I have a little too much storage space. Between Amazon S3, the two 500GB G-Drive Q external drives and the 500GB Apple Time Capsule, I have over 2TB of storage. I don't think I have that many photo and family videos and my iTunes library isn't that large either.  The Amazon S3 is used to backup photos from our iPhoto library stored on the G-Drive Q Media and documents stored on the G-Drive Q.  The Time Capsule is for backing up the three Macs via Time Machine.picture-11