Notes app taking more than 18gb Storage

Hi ameralshaibani,

Thanks for coming to Apple Support Communities for help today.

If your iPhone needs more storage space, we'd advise having a look at this article: How to check the storage on your iPhone, iPad, and iPod touch. It's likely this will delete over time as space is required.

"To make more storage available, your device can remove some of your items, like streamed music and videos, files in iCloud Drive, and parts of apps that aren't needed. It also removes temporary files and clears the cache on your device. But your device only removes items that can be downloaded again or that aren't needed anymore."

If you still have concerns, please visit Apple Support for a deeper dive.

Have a fantastic day!