I have an iPhone 4, not jailbroken. When I sync to iTunes the backup is saved to my Win 7 laptop (not iCloud). The phone is working great and is set up the way I want it. I need to wipe the hard disk on the laptop and do a reload and I want to make sure that I don't have any issues with iTunes or my phone when I'm all finished. I've been doing some reading on the Apple website, but am a little confused about the difference between the libraries and the backup (or IS there any difference?). I'd appreciate any guidance in the steps I should take before I wipe the hard disk.