Well I bought WD MY PASSPORT ULTRA 1 TB for no reason. But I got it under use when I had to load some movies and my personal stuff onto it.
There it proved its relevance, which for me was part excellence. I mean it gets fit into your palm very easily just put it into your pockets and store and access your data anywhere anytime.
Also there Is a very friendly application given for windows and Mac. For maintaining backups and removing them.
Personally loved it. Just go and but it if you are in need.