Delete old backups in iCloud Backup
Remove unused app data from iCloud settings
Delete large files from iCloud Drive
Empty the Recently Deleted folder in iCloud Drive
Delete old photos and videos from iCloud Photos
Remove duplicates and blurry images
Turn off iCloud sync for apps you do not use
Delete old messages and attachments from iCloud Messages
Remove large email attachments from Mail
Review and delete files in shared albums and shared folders
Check storage usage in iCloud settings
Upgrade your iCloud storage plan if needed