Open the Files app
Tap Browse
Find the document or folder
Press and hold the item
Tap Delete
Open the app that contains the document
Select the document
Tap Delete or Move to Trash
Open Notes
Open the note
Tap More
Tap Delete Note
Open Photos
Select the photo or video
Tap Trash
Confirm Delete
Open Messages
Open the conversation
Press and hold the message
Tap More
Tap Trash
Open Mail
Open the email
Tap Trash
Open Safari
Tap Bookmarks
Tap History
Clear browsing data
Open Settings
Tap General
Tap iPhone Storage
Select the app
Tap Delete App
Open Settings
Tap Privacy & Security
Tap Location Services
Turn off access for apps you do not want storing location data
Open Settings
Tap Safari
Tap Clear History and Website Data
Open Settings
Tap General
Tap Transfer or Reset iPhone
Tap Erase All Content and Settings
Open iCloud.com or Settings
Remove synced files, photos, notes, and backups from iCloud if needed
Empty the Recently Deleted folder in Files, Photos, and Notes
Delete app data by uninstalling the app and reinstalling it if needed