I'm trying to archive a backup of my iPhone on iTunes on Windows. Per the iOS nine beta instructions it says to archive a backup before installing the beta. However I see no option to archive and can't find anything online. Anybody have any answers?
Simply backing up your phone to your PC should be enough. By archive, they're just telling you to keep your backup safe and not delete it. This is so that if you have a problem with the beta software, you can easily restore your phone to a working state.