iCloud don't comply to ordinary standards for sharing. I think Apple should be on trial here in Europe for avoiding basic rules for cloud-based sharing. You cannot access the files one by one, and erase what you need. Even though your iCloud is full, there is no service available to stay on the free platform. Nor help online from Apple. You are left with two options: Buy an upgrade or erase everything. Furthermore, iCloud access comes via the IOS upgrade. It should be an option alongsige European alternatives like Pcloud and Jottacloud. I'd like to quote Goethe: 'Man merkt die Absicht und wird verstimmt'.
