The basic iCloud storage plan allows you 5GB of free space to backup your data. You can adhere to this storage allowance through the iCloud section in your Settings app. You can select certain apps to backup and exclude others. If your need a higher storage plan to backup your iOS data, you can choose one of the paid iCloud storage options. If you were to choose the 200GB or the 2TB option you can opt into the new iOS 11 Family iCloud Storage Plan.
It’s vitally important to regularly back up your iPhone and iPad. You can choose to use Apple services such as iTunes or iCloud to back up your data. Or you can select a third-party service to backup your data. Each time you backup your device you are insuring yourself against data lost in almost any event.