When I try to create new files I’m getting an error of ‘unable to create folder on the server (quota exceeded)’. I also can’t delete any files and my trash bin has got thousands of files in it.
Who is your email provider?
I’m not sure how to find that out?
That means the part after the @ in the email address. Like GMail or Outlook.com. If it is a company email, it will be hosted by some company like Rackspace (just voted #1 by TechRadar).