How do I cancel my .99 cent subscription for extra IPhone storage?

 Downgrade or cancel your iCloud+ plan

Downgrade or cancel your iCloud+ plan - Apple Support

If you're referring to iCloud+, click here and downgrade to the free 5GB. Otherwise, check the service's documentation.

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Appleiphone13mini Said:

"How do I cancel my .99 cent subscription for extra IPhone storage?: I just got rid of my IPhone 5! Got a new phone today. My question is, how do I cancel my monthly payment I was making for extra storage? Don’t need it anymore."

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Upgrading iPhone Storage:

You Can't. Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support. So, cancelling iCloud+, and it will have no affect on your device's internal storage.