I need help!

Hi, you can look at this site to see how to free up more storage: Delete photos on your iPhone, iPad and iPod touch – Apple Support.

Whilst you cannot purchase additional internal storage for your iPhone, you can upgrade your iCloud storage:Buy more iCloud storage - Apple Support

Hi

Do a backup of your device then erase it. then restore the device from that backup. That will remove most of the "Other"

Restore your iPhone, iPad, or iPod touch from a backup

Learn how to restore your device from a backup in iCloud or on your computer.

https://support.apple.com/en-us/HT204184

Can you tell us how much total storage does your iPhone 11 Pro Max have and how much of that total storage is in the "Other" category? Thanks.

Axel F.