How can I remove the backed files from my iphone to the iclod

Hey there! If you’re syncing photos with iCloud, if you delete them from your phone, they are also deleted from iCloud.

If you don’t sync your photos with iCloud, and delete photos, they will only be deleted from your phone.

You can also log into iCloud.com, also if you delete photos or files there, they are also deleted on all your devices using those iCloud services.

As Halliday said as well, the optimize storage feature is a good option to use if your phone’s storage is full.

If photos are utilizing most of your phone’s storage, you can also import them to a computer for a copy then delete from your phone.

Hope that helps! Here’s a good article:

Manage your photo and video storage:

https://support.apple.com/en-us/HT205703

Cheers.

What does iCloud back up? - Apple Support

iCloud backup doesn’t include information that are synced and stored in iCloud, like Contacts, Calendars, Bookmarks, Mail, Notes, Voice Memos, shared photos, iCloud Photos*, Health data, call history, and files you store in iCloud Drive.

*-If you had turned on iCloud Photos, your content is automatically stored in iCloud. 

The closest thing you can do, Wellfleetmainstreet, is to turn on iCloud Photo, and Optimize storage on your device.

Over time, photos that you haven’t accessed, for a while, will be “optimized”—replaced by a version that takes up less space—while the full resolution versions will remain on iCloud.

You should also follow the instructions in Clear Other storage on your iPhone or iPad - Apple Support.