[davide_v]

So if I upgrade my photos don't upgrade to full res automatically, but if I download them they are actually full res? I don't have the original photos anymore, that's why I'm asking if Google keeps the full res and I'm able to retrieve them with a paid plan.

[jcomis]

Only if you originally uploaded them in full res. If you originally updated them in high res and that's it, that is all they have.