Specific steps (take the iphone as an example below)
1. In the mobile phone we click "Settings" > "General" > "Software Update", we see if it is possible to update the latest mobile phone system (this can be upgraded or not upgraded).
2. If you want to upgrade to upgrade it, do not upgrade we click on the iphone "Settings" > "ICloud" > "Storage and Backup" Here you will see the data we backed up, there is a "last backup" message, and the last backup date later.
3. Now we go to the iphone "Settings" > "General" > "Restore", then tap "Erase all content and settings".
4. Then we then "set up assistant"-"Set your device"-"Restore from backup" and log on to ICloud.
5. Now that you are logged into the ICloud, we can "pick up the backup" and then choose from the list of available backups in ICloud.
Note: icloud can only back up 5G of data, more than 5G of data we need to upgrade the cloud space Oh, you can buy a higher level of storage solutions to replace the previous scenario (for example, using a GB solution to replace the GB solution). The existing storage space program will be canceled and you'll need to pay a prorated fee for the upgrade, which is explained by the Apple official.