Like Acadia, I back up the same files on two different external hard drives.

You might want to look into Blu-ray burners, you can pick one up these days for a couple of hundred bucks.

In addition to backing up on the two hard drives, I also back up on Blu-ray. I can burn up to 50 GB on a dual layer disc. The disks are a little spendy, so I back up new stuff on DVD's for six months then burn everything to Blu-ray again. I can back up my entire 3D folder with all my programs, projects, everything, on 5 disks,

Coldrake