I imported 13GB of photos, which should be plenty small to use the iCloud 20GB plan, but my Photos library is 23GB! That's nearly double the size. Not only does it require a pricier iCloud plan, it takes up precious space on my SSD. I've searched around and haven't found any problems to fix. Seems this just might be the case. Does anyone have any ideas why my Photos library might be so much bigger?