Delete unused apps
Offload unused apps
Clear Safari history and website data
Remove large photos and videos
Delete duplicate photos
Empty the Recently Deleted album
Use iCloud Photos
Turn on Optimize iPhone Storage
Delete old messages and attachments
Set messages to auto-delete after 30 days or 1 year
Remove downloaded music, podcasts, and videos
Delete offline maps
Clear app caches where available
Review and delete large files in the Files app
Check iPhone Storage in Settings
Restart the iPhone after cleanup