Your university email only provides unlimited storage if they have a subscription to provide that.
Your university does not currently have a Zotero Institution subscription that provides storage for all users there. Since you have the email address on your account, if they do start a subscription it will automatically be applied.
Your university does not currently have a Zotero Institution subscription that provides storage for all users there. Since you have the email address on your account, if they do start a subscription it will automatically be applied.