Just like that;
When Apple makes a new OS or IOS I do not need to download anything. I go to update, it will ask me if i am sure i want to install a new OS. it warns me that all my stuff will be lost if i change my OS. It will then ask me for my password. Once i put in my password, up comes a box reading "wait" and in about 20 to 90 minutes later the device resets and comes back on and the new OS is on, up and, running. No downloading, no cd, no usb drive. I dont need to know anything about tech or computers to go from one old OS to another new OS.