I am totally confused about when connecting my iPhone 5 to my PC on iTunes. I have 2 options: Back-up or Restore? I have tried both. Back-up takes under 1 hour but Restore takes many hours, what is the difference? Which to use in case phone breaks or gets stolen? Or should both be used? When I make a new Back-up, will the previous Back-up be erased or is that kept as well in my PC? It's great that a PC can save all the data; do other brands have this feature, or only iPhones?