I buy 200 GB already why you my Iphone still show up Storage full huh?

After reading the link in blue above your name you will realize that you must delete photos, messages, apps, etc. in order to make more storage space on the phone. Be sure to save important photos to your computer or an external drive. Check these links...

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

Clear Other storage on your iPhone or iPad - Apple Support