Upgrade or downgrade your iCloud storage
When you sign up for iCloud, you automatically get 5 GB of free storage. You can upgrade your storage space whenever you need to, and if you upgrade to 200 GB, you can share your storage plan with your family. See the Apple Support articles iCloud storage plans and pricing and Family Sharing.
While you can check your iCloud storage usage on iCloud.com, use the Settings app on an iPhone, iPad or iPod touch to upgrade or downgrade your storage. You can also use System Preferences on a Mac or the iCloud for Windows app on a Windows computer.
For an overview of what you can do with iCloud storage and how to make more space available, see What is iCloud storage?
On your iPhone, iPad, or iPod touch, go to Settings > [your name] > iCloud > Manage Storage > Change Storage Plan.
Do one of the following:
Upgrade: Choose the amount of storage you want, tap Buy (in the top right-hand corner), then follow the onscreen instructions.
Downgrade: Tap Downgrade Options, enter your Apple ID password, choose the amount of storage you want, then tap Done.
When you downgrade your iCloud storage plan, the storage decrease takes effect after your current monthly or annual subscription ends.