iOS Gallery Backup

Hi everyone,
is it possible to configure the iOS App to delete the uploaded local media on iOS? In my opinion it is pointless to backup media to nc and walk around with a full and useless iphone.

At the worst i need to import all the stuff into windows 10 pictures app to delete it from the iphone and creating more backups of the host. But then, nc is useless for an ios gallery backup and my doing.

Many thanks for your answers.

I just delete them from the phone now and then…