I put in over 200 contacts onto my iPhone manually (name, phone, address, email, etc) and would like to store these contacts on my PC in case of a needed reset, crash, theft, etc. ie. as a backup. In iTunes, there is an option to "sync contacts from ____ (Yahoo, Windows, or Outlook). I dont have these contacts already stored on my PC or on the internet, only on my iPhone. 1. If I chose to sync contacts, will this erase all of my contacts from my iPhone? 2. if it does not, where will they be stored and how can I access them on my computer? 3. If I change some of the contact info on my iPhone AND computer seperately, what will happen when I sync them?