How to delete files and data from Apple's mobile phone?

Let's use the iphone6s to demonstrate how to delete it.

1. Open the phone and find "Settings". Most software management settings in the mobile phone can be completed here. Swipe down to find "General"

2. Click to enter "General", and you can see home screen buttons, auxiliary functions, iPhone storage space, background application refresh and so on.

3. Click to enter "iPhone storage space" to see the current storage state of the mobile phone, and swipe down to see the storage space ranking of all applications in the mobile phone. The higher the ranking here, the more storage space it takes up.

4. After finding the application storage ranking of the mobile phone, you can delete those applications that occupy more memory.

5. "Uninstall the application" just uninstalls the application, and still retains the documents and data in it. Click "Delete Application" to delete documents and data to make room for the phone memory.