So with Windows 10 heading to RTM right away, and because I'm an insider I'll be having first access to the RTM copy of WinX, I wish to back up the entire contents of my hard drive (Approx 450 GB to a 3 TB external drive), and perform a clean installation on my laptop, leaving nothing behind and allowing the computer to breathe freely of all the shit I've put on it over the past few years. There's a few things that I wish to ensure though: 1. I can do this over a USB 3.0 connection 2. I can browse the files through Windows Explorer after I've upgraded, as to copy back the files I wish to keep 3. The backed up files are not in some proprietary format that I cannot access later on I'd presume I could possibly do this with a Ubuntu Live CD or USB, but are there any other options?