How can I increase my Device storage?

Howdy! Unfortunately there is no way to increase the physical storage of an iPhone. However there are a few options.

1.) Use cloud storage, like iCloud, to backup your photos and videos.

2.) If you have a lot of music downloaded, consider subscribing to Apple Music so you can stream the songs instead of having them downloaded.

3.) Make a full backup of your iPhone on your PC or Mac with iTunes, then reset the phone and start from scratch.

4.) Get a new iPhone with more storage.

Here's some information from Apple that cover each of the options listed above:

1.) Introduction to iCloud - Apple Support

What you can do with iCloud storage - Apple Support

How to back up your iPhone or iPad with iCloud - Apple Support

2.) Music - Official Apple Support

3.) How to back up your iPhone, iPad, or iPod touch with iTunes on your PC - Apple Support

How to factory reset your iPhone, iPad, or iPod touch - Apple Support

Hope this helps!