I got a message that my Gmail account was full and I couldn’t receive or send emails. I’d gone over my 15Gb free limit!
I deleted lots of emails which made no difference to the amount at all, so investigated things a bit further. It seems most of my allowances has been taken up with Google Drive and Google Photos - two libraries that I didn’t sign up to or know about!!
Deleting the stuff in Google Drive released 7Gbs.
Rod