I wouldn't worry about the duplicate files, just compress your hard drive image and write it out to a blue ray disk and you're good for at least a decade. Just keep about 5 years worth of reading material on your local hard drive(s) for your current reading requirements. Who knows what kind of memory density will be available in ten years, you may have several hundred terabytes local by 2010.
Last edited by oggelbe2007; 06-29-2010 at 07:12 PM.
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