That's an interesting bug/problem(?) he ran into.. Though, on the topic of reducing storage usage, in the Photos iOS app, you can remove photo duplicates under

That's an interesting bug/problem(?) he ran into.. Though, on the topic of reducing storage usage, in the Photos iOS app, you can remove photo duplicates under "Albums" at the very bottom -- if you have duplicates that it recognizes, there will be a line item for this, otherwise the line item will disappear.