Photos on my iPad are backed up on iCloud, but as my iCloud storage is full I want to back up my iCloud photos to an external hard drive. How do I do this on my Windows desktop PC? I do not have a Mac.
Sign in to https://www.icloud.com and download/ export your photos from the web app.
I use an app called Photos to Disk http://www.photos-to-disk.com/
It's really easy to use and it has automatic folder organization options