Storage Solutions What's the difference between these two external drives?

Can anyone clarify the difference between two drives mentioned beow:

Code:
http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&sku=A3098104

Code:
http://accessories.us.dell.com/sna/products/System_Drives/productdetail.aspx?c=us&l=en&s=bsd&cs=04&sku=A3002385

Is the MyBook essential one worth it more than 30$ as compared to elements one?

I am going to use it only for storing movies/games/songs.
 
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