Delete unused apps
Offload unused apps
Remove old photos and videos
Empty the Recently Deleted album
Delete duplicate photos
Remove large message attachments
Delete old text conversations
Clear Safari website data
Delete downloaded music, podcasts, and videos
Remove offline files from apps
Check iPhone Storage in Settings
Use iCloud Photos
Enable Optimize iPhone Storage
Back up and transfer photos to a computer or cloud service
Update to a larger iCloud storage plan
Reset and restore only needed data
Use external storage devices compatible with iPhone