How to prepare your devices for iOS 9

iOS 9 officially launches Wednesday, bringing huge changes to iPhones, iPads, and iPods. But before you rush to upgrade, take some time to get your device ready. That way, if anything goes wrong during the install process—or if you decide you hate iOS 9—you can reverse your decision without losing any important files.[ Related: 7 tips and tricks for iOS 9 ]The good news: You won’t have to delete a whole bunch of apps to get ready to upgrade. Why? The new OS will do the deleting