Why did my account not upgrade to Premium? Virag 27 August 2019 12:42 Updated Follow If a new user signed up via your personal referral link, but your account didn't upgrade to premium, please email us at email@example.com. Related articles What is the friend referral promotion? Is there a size limit on PDFs that I can save to the Locker? How can I set up/change my Dropbox integration? Kopernio History Comments 0 comments Please sign in to leave a comment.