1, iCloud is a cloud storage service launched by Apple, which is convenient in data security and file sharing, ensures the data security of iPhone users and is convenient for users to use.

2, use steps:

⒈) First, find the "iCloud stored in backup" application in iPhone, and then open the "iCloud cloud backup" option:

(2) After "iCloud Cloud Backup" is turned on, iCloud will automatically perform data backup. By default, the maximum amount of data that can be backed up is 5GB. If you need more Apple iCloud storage space, you need to pay to upgrade the cloud storage space. For general use, the 5GB provided by Apple is completely sufficient.

[13] Then enter "Manage Storage Space", and then you will see the space occupied by backup and mail. Select the backup of the device to manage. ICloud will display local information, the latest backup time and size, and many things that iCloud can back up, such as mobile phone address book, photos, emails and even applications. By default, only five backup messages are displayed. For more information, click Show All Applications.