How do I move data from iCloud to iPhone storage?

"moving iCloud storage to my iPhone storage: My iCloud storage is full but my 128 Gb on my iPhone storage is empty so how do I move my iCloud storage to my iPhone storage"

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Moving iCloud to iPhone:

You'd have to download it. Then, disable it in iCloud Settings. If you delete it from your iPhone, then it be deleted from iCloud too. So, rather than downloading it to your iPhone, I suggest two things: (A.)Download all of iCloud to an external hard drive and (B.)Clear iPhone space.

A. Download All of iCloud to External Drive, Instead:

Use my User Tip: Getting a Quick and Direct "iCloud Drive-to-External Hard Drive" Download - Apple Support

B. Clearing iPhone Space:

See if you need to clear lots of space. System resources may be using up too much services, making it overheat. 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, what to do...

Clear Space, Using my User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip
• How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip