Root [Verizon] Unable to nandroid backup

[ohyaknow76]

I have CM10 and clean rom. Today I wanted to go back to Clean rom. My backup failed. Then I went back to cm10. And when I did all my memory was gone on device and sd card. I have switched back to each rom many times in the last few days. Have done nothing different. Any ideas. Thanks

 

[ohyaknow76]

And what is sd0 and sd1?

 

[ohyaknow76]

Also why would I be able to use recovery for cm10 but not be able to use my back up with clean rom?