I have almost no disk space left on my MacBook Air.
Having run Disk Inventory X, one of the main hogs is the files under Users/MyName/Library/Containers/com.apple.cloudphotosd/Data/Library/Application Support/com.apple.cloudphotosd/services/com.apple.photo.icloud.sharedstreams/assets (assets contains several folders with gobbledygook names).
**The content here seems to be my iCloud Photo Sharing shared photos (ie. "Shared" in Photos), which is about 21.9Gb large.
I don't understand why this is the case, since my "Photos" folder (ie. library) is only 12.94Gb large (local storage is optimised, real library more like 52Gb).**
My MacBook Air early 2015 has the 120Gb storage and runs OS X 10.11.6
So, what is this folder mentioned above, why is it so large, and can I delete any of it without losing my Shared photos or the photos streams which I have been added to?