iCloud account

Rather deleting the account permanently from the server How to delete your Apple ID account - Apple Support

Sign out Apple ID Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support ( select keep on copy ) .

The iCloud data will stay on iCloud , but will be removed from iPhone , later if you sign in with same credentials the iCloud data saved from inbuilt applications will again sync .

Missjennyziegler Said:

"iCloud account: How to delete my iCloud account without losing anything on my phone"

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Download All of iCloud, First.

There is not iCloud Account. So, if you want to downgrade you plan, then download it all, first. Use my user tip: Getting a Quick and Direct "iCloud Drive-to-External Hard Drive" Download - User Tip

The Link: Downgrade or Cancel your iCloud+ plan - Apple Support