How can I delete photos on my phone but keep them on iCloud? Mine keep deleting in both places frustrating me
How can I delete photos from my iPhone but keep them on iCloud?
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iCloud is a syncing service, not a storage service. If you delete photos one place, they will be deleted on every device you have that's syncing to iCloud. That's expected behavior.
You can, however, use Optimized Storage to cut down on the amount of space photos take up on your phone:
Manage your photo and video storage - Apple Support