to delete photos from your iPhone but not iCloud.

Open your settings app.

Then press your Apple ID.

Then press "iCloud."

Press "Photos."

Then, next to "iCloud Photos,"

press the toggle to disable photo sharing.

If you have optimize iPhone storage enabled,

you'll have to choose "Remove from iPhone"

or "Download Photos & Videos."

Either option will keep originals

saved within your iCloud.

Let's set up a different iCloud server

for photo backup.

For this example, I'm going to use Google photos,

but there are many other cloud options

you can choose from,

including OneDrive, Dropbox, or Flickr.

Open the app store app on your iPhone

and download Google photos.

Open the Google photos app.

Press "Allow access to all photos."

Then grant access to your photos

by pressing "Allow Access to All Photos."

Choose if you want Google photos

to send you notifications.

Now choose what Google account you want

to back up to.

Now choose your backup options:

storage saver or original quality.

If you don't want to lose

the highest possible quality of your photos,

then choose original quality.

If storage space is a priority,

then choose storage saver.

This setting will slightly reduce

the quality of your images.

The backup process will automatically begin

and can be monitored

by pressing on your profile image.