Open Settings on your iPhone or iPad
Tap your name at the top
Tap iCloud
Tap Manage Account Storage or Manage Storage
Tap Change Storage Plan or Buy More Storage
Choose a storage plan
Confirm the purchase with your Apple ID
On a Mac, open System Settings or System Preferences
Click your name or Apple ID
Click iCloud
Click Manage
Click Change Storage Plan or Buy More Storage
Choose a storage plan
Confirm the purchase
On Windows, open iCloud for Windows
Sign in with your Apple ID
Click Storage
Click Change Storage Plan
Choose a storage plan
Confirm the purchase
Delete old backups from iCloud
Remove unused photos and videos
Delete large files from iCloud Drive
Delete old messages and attachments
Empty the Recently Deleted folders
Turn off iCloud backups for apps you do not need
Optimize photo storage on your device
Review and remove duplicate or unnecessary files