I currently have my development environment on a usb hd. It has things like portable xampp, virtualbox with ubuntu guest, portable firefox and other dev tools. It works fantastic! I can attach it to almost any computer and all works fine. However, if this drive decides to go suicide on me I will be close behind it. The problem I'm having is I use this portable HD almost all the time and so I need a fast way to backup the entire drive. It is around 400gb. Any advice?