Delete unused apps
Offload unused apps
Clear Safari history and website data
Remove large photos and videos
Empty the Recently Deleted album
Enable iCloud Photos
Optimize iPhone storage
Delete old messages and attachments
Set messages to auto-delete
Remove downloaded music, podcasts, and videos
Clear app caches where available
Delete offline files from apps
Review and delete large files in the Files app
Delete old mail attachments
Restart the iPhone after cleanup