My storage is full, my photo library is around 4.5GB plus backups etc. I want to prevent my photo library from being backed up, as this is taking up the vast majority of storage. I am happy to have photo library local on my macbook and manually sync my phone. To do this do I just need to switch off photo's in icloud for both devices? I switched them off on the macbook and it didn't change the size used in my icloud.