I have been using iCloud Photo Library for a year or so now. Over the course of the year, I've restored from a backup twice because of totally unrelated things. But I have noticed after restoring from a backup, my photo storage is very, very low. But I still have previews of all my photos on my phone because they are in iCloud. For example, the other day I wiped and restored from a backup. Before the backup, I had 10GB free on my phone. After restoring from the backup, I have 42GB free. My question is, how can I free up storage like that WITHOUT having to restore from a backup. Is there a way to force all my stored photos to only be on iCloud? Hopefully this post makes sense. Thanks.