BACKUP Between 2 WD MY PASSPORT. HOW IS IT? COMO ES?

I have 2 WD MY PASSPORTs and I don’t know wich software i need to make copys between each other and how use this software. Thanks for youre time!

Hi,

Take a look at this article:
https://support.wdc.com/knowledgebase/answer.aspx?ID=1717&lang=en