Select all the chats you want to delete and hit the Trash icon in the top-right corner ... go to Settings > [YOUR NAME] > ...
Regardless of how much internal storage your iPad comes with, Apple gives you just 5 GB of iCloud storage by default, which you can use to store files and back up your device in the cloud.
Results that may be inaccessible to you are currently showing.
Hide inaccessible results
Feedback