How to cancel the extra storage I pay for

See this for instructions.

Downgrade or cancel your iCloud+ plan - Apple Support

Daizey10 Said:

"How to cancel the extra storage I pay for: How to cancel my extra storage I pay for each month"

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Download All of iCloud, First.

If you want to cancel your iCloud Plan, then back up your info from it first. Use my user tip: Getting a Quick and Direct "iCloud Drive-to-External Hard Drive" Download - User Tip