Insufficient memory

Yeppppppppplo Said:

"Insufficient memory: Why does my iCloud memory say I don’t have sufficient memory, when I do and it’s all paid up."

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Try Clearing Space:

Too many system resources may be being swollen up. They are being used by unnecessary items. So, consider performing the following...

A. Clean TV and Music Libraries:

Remove all unneeded files from your TV and Music Libraries. Full-Movies take up 2-4GB typically, and a bunch of those would take up a load of storage, ideally. So, if you have any movies that are not needed, then delete them.

Also..

B. Clear Temporary Internet Files:

Clear your Temporary Internet Files(Cookies & Cache) of Safari:

• Cookies perform remembrance of certain site-entered data.
• Cache keeps a snapshot of the last time you visited a site.
• Go Here: Clear the History and Cookies from Safari on your iPhone, iPad, or iPod Touch - Apple Support

Also..

C. Clear "Other":

Clear the storages named "Other". It basically contains unnecessary files such as caches that are used for system ease of use - all of which gather over time: How to Clear "Other" in your iPhone's Storage - Use Backup - User Tips

Yeppppppppplo Said:

"Insufficient memory: Why does my iCloud memory say I don’t have sufficient memory, when I do and it’s all paid up. […]I have paid for 50gb. So why is it saying I have no memory left and does not upload my photos etc to my iPad and iCloud???”

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To Emphasize:

A. About Storage:

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, you'll just have to clear space, and then perform the data transfer.

B. Automatically Uploading Data to iCloud:

To get things (i.e. photos) to automatically upload to iCloud, you need to enable it yourself in iCloud settings. Item types that are not listed need to be uploaded through use of the Files app.

For Example, here is how to Upload Photos Automatically from your iPhone and iPad:

1. Go to: Settings
2. Tap: Your Name (Top Item)
3. Tap: iCloud
4. Tap: Photos (so that it is green)

If you have enough available storage, then all should upload just fine. But, give it some time to upload. Lastly, things are not automatically downloaded —you need to download it yourself —that’s just the way Apple designed iCloud.

Yeppppppppplo Said:

"Insufficient memory: […]Thanks so far, hope you can solve my problem”

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You are welcome.

Reportedly, it is a Bug:

See this Post: “iPhone storage almost full” bug - Apple Community

Report this to Apple:

Do your part: Let Apple know what is going on here. Provide them with feedback on this. They may not get back to you directly, but the more feedback they received on this, the more they will know what is going on, and what needs to be fixed in updates to come.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this began after installing the latest update, and how you have troubleshot it thus far. Also, provide them the URL of to this post.
4. Proceed from there aw necessary