Please read my full post, I made mention of my set server limit. I as a site operator can upload up to my defined max file size I set on the server.

Whatever I set the max file size for the Standard user role, also gets applied to the Premium user role, each time I adjust the Standard role allowed file size and had my premium user test, they confirmed it was also changing for them, as a premium user despite me not touching the premium user role file size limit.