It says my storage is almost full. I have deleted anything that would need storage. Can you tell me what is using the storage?

The storage limit is about the submissions that your account can keep saved, this limit is only for free accounts and you need to delete your oldest submissions to avoid getting this message, otherwise your oldest submissions will be deleted. 

However, I have checked your account and I can see you have already upgraded your account so you will not be notified about it and you will not receive notices about out of storage anymore. 

If you have questions, please let us know, we will be glad to help you.