Using classic Outlook for Windows in business environments
Dear Dennis,
I’m sorry to hear that you’re having trouble with your iCloud storage. You can manage your iCloud storage by going to Settings > [your name] > iCloud on your device and tapping Manage Account Storage or Manage Storage. You can then turn off any apps that you don’t want to back up and choose Turn Off & Delete. (source: https://support.apple.com/billing *)
Regarding your question about billing for iCloud storage, Apple offers different iCloud+ plans with different storage capacities and prices (source: https://support.apple.com/en-us/HT201238*). If you have already subscribed to a plan that includes 50 GB of storage for $1.29/month, then your email should be covered by this additional storage.
However, if you’re still having trouble with your email account despite having purchased additional storage, I recommend contacting Apple support directly for further assistance.
* Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
I hope this helps! Let me know if you have any other questions.
Best Regards,
George A.