Update my iPhone using my computer

First you will need to make more space on the phone by deleting photos, messages, apps, etc.. Be sure to save important photos and data to your computer or an external drive. Instructions for update in this link...

Update your iPhone, iPad, or iPod touch - Apple Support

I can’t read the screen shot. What is the message? Here is how to update your phone→Update your iPhone, iPad, or iPod touch - Apple Support

Glad I could help!