how to iphone backup

When I am getting ready to restore iPhone from backup on computer, a dialog pops up suddenly and asks a password to unlock iPhone backup. Now I only know that I have forgotten iTunes backup password. So I guess and try several possible passwords, Apple ID password, default password, iPhone unlock code, and Windows administrator password, but they don’t work. How can I unlock iTunes backup for iPhone on Windows computer after iTunes backup password forgot, If we have known the way to backup iDevice data, we should make sure iCloud and iTunes are two general ways to backup data on iDevice. Therefore, if your ultimate purpose is to restore iPhone from backup file. To achieve this goal, there are two methods available at least, including unlocking iPhone backup. If you have the Apple ID and password, login into iCloud with it in iPhone, and you could restore iPhone from iCloud backup. When iOS device is open now, following steps to restore iOS device from iCloud backup. Turn on your device.