storage full problem please I want to know why??

How to check the storage on your iPhone, iPad, and iPod touch

https://support.apple.com/HT201656

- General article on seeing what is taking up storage on an Apple mobile device and tips on how to clear some storage space.

How to Free up space on your iPhone [Apple YouTube video] --> https://www.youtube.com/watch?v=bnhuHSv_WrI

Note there's different kinds of "storage". Click on this link to "Learn the difference between your device and iCloud storage, ways to manage your space" and upgrading to iCloud+ if you need more --> https://support.apple.com/HT206504

If you can't back up to iCloud, click here --> https://support.apple.com/HT203516

If restore from iCloud backup failed, click here --> https://support.apple.com/HT212201

Manage your photo and video storage --> https://support.apple.com/HT205703

'If you can't connect or sign in to iCloud', click here --> https://support.apple.com/HT203512

"If you still need help

If you still need help signing in to iCloud, update your iPhone, iPad, and iPod touch to the latest version of iOS or iPadOS, and your Mac to the latest version of macOS. See the iCloud system requirements for more information."

For official Apple Support click here --> https://support.apple.com/choose-country-region Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232