Yes, it is possible. Additional storage for faculty and staff is billed at the rate of $45/GB per year (charged monthly). No additional storage usage is permitted for students.
To request additional storage, log on to https://www.uab.edu/itbilling. You will need to log on with your Blazer ID and password. For assistance with mailbox management techniques or any additional questions or concerns, please contact AskIT at 205-996-5555 or open a ticket by email at askit@uab.edu.