I have a 256gb 8+ and my current local storage usage right now is 8gb (b/c of icloud library storing originals and optimizing iphone). Regardless of having approximately 100gb of photos and video in icloud photo library, i won’t have a problem backing up this iphone with icloud to a new 64gb iphone, correct? I’m asking because when my phone is “un-optimized”, my storage usage jumps to 72gb.