Best External Hard Drive?

I use a triple back up system for all my files since I have so many image files I never want to lose.

1T SS external hard drive that I back up to annually. I copy onto my iPad and burn CDs as I go over the year. I have over 25k images in my files that I have created and want to make sure I have multiple ways to recover them if stuff fails.

I also copy into email on 2 different servers as an additional redundancy.