I've been uploaded photos to Google Photos with original size instead of high quality.
Now, my Google storage (Drive) is full and I want to change the size of the already uploaded photos to the high quality option for unlimited photos backup.
How can I change the size of the photos after it already been uploaded?
Here is a screenshot with an explanation from Google:

Thanks.
You can do it from the Google Photos web app settings page.
Recover Storagebutton.That it :)