Tap Optimize iPhone Storage. Be patient, since it may take a while for the offloading process to complete. You should be able to keep using your iPhone in the meantime.

By optimizing your iPhone's storage, you can reduce the amount of file space your photos are collectively using up in your device. On your iPhone, you can optimize on-device storage and cloud storage.

You don't need a dedicated iPhone photos storage cleaner to free up space. Instead, you can use these tips to quickly reduce the space occupied by photos and videos on your iPhone and on iCloud.