You have 2 ways to access the capacity manager, backup iCloud on mobile devices
Step 2: Select Manage Storage
Step 3: At this point, you will see devices using the same Apple ID account. Select your device, you will see their content, applications and storage capacity backed up on iCloud.
Select the device you need to manage backups
Step 4: On Backup Option , you switch from ON to OFF unnecessary applications such as dictionaries, magazines, games . These are applications you can easily reload when needed and when choosing to delete backups , you free up several hundred MB to even GB of storage.
You can switch modes from ON to OF F applications you do not want to back up data to iCloud.