How to up grade storage to 2 T?

See the articles Update your iPhone, iPad or iPod touch – Apple Support

Bundle Apple subscriptions with Apple One – Apple Support

If you already have an iCloud storage plan or other subscriptions

• Do you already have an iCloud+ plan? Find out what happens to your iCloud+ plan when you join Apple One.
• If Apple One costs less than your current subscriptions, you will not get a free trial so that you can start saving money immediately.

What happens to your iCloud storage when you sign up for Apple One – Apple Support

If you need more iCloud storage

After you’ve subscribed to Apple One, you can buy more iCloud storage if you need more. With both Apple One and an iCloud+ plan, you can have up to 4 TB of total iCloud storage.

Apple One - Apple

• Which device and operating system do I need?
• Open to read more about Which device and operating system do I need?
• Close
• Apple One services work across your Apple devices, including iPhone and iPod touch with iOS 14 or later, iPad with iPadOS 14 or later, Apple TV with tvOS 14 or later and Mac with macOS Big Sur 11.1 or later. If you subscribe through another device, you can still enjoy Apple One on any version of macOS earlier than macOS Big Sur.

If you're referring to the iPhone's internal storage, you can't.

If you're referring to space on Apple's servers, click here and follow the instructions.

(225154)