Installation migration - how do I back up personalized files?

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http://forums.fedoraforum.org – I've had the same Fedora server (filewise) since it was RedHat, but I'm getting major issues with an open Bugzilla report and I'm considering a brand new install. The thing is - I've had files on this server since 1999, really, with personalized settings and everything in between. Is there any easy way to start a fresh install (on a brand new hard drive) and migrate my files over? Otherwise, how does one do a fresh install without losing files and programs they've been painstakingly been trying to maintain for an entire decade?! I don't even know how to install half of this stuff anymore. The computer was on autopilot for the better half of the last 10 years. Am I out of luck, or is there an easy way to back up settings and restore them? (HowTos)