How to get more storage for my iPhone X?

You can't get more storage on your phone, it is a fixed size.

Here are some helpfull articles that can guide you on how to free up storage space on your phone.

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

https://support.apple.com/en-us/HT201656

Manage your photo and video storage

https://support.apple.com/en-us/HT205703

Clear Other storage on your iPhone or iPad

https://support.apple.com/en-us/HT211686

Jaylabrefo Said:

"How to get more storage for my iPhone X?: How do you get no iPhone storage in your iPhone"

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Use iCloud Storage Instead:

Rather than going directly on your iPhone, you'd upgrade your iCloud storage plan, instead (if an option in your area). Go Here: iCloud Storage Plans and Pricing - Apple Support