Abstract: A printing device stores data associated with a print job in a memory device. The print job or portions of the print job have an associated reference count(s) indicative of whether the print job or portions of the print job are write-protected. The reference count(s) is incremented and/or decremented responsive to printing of the print job. A control system is configured to permit the print job or portions of the print job to be overwritten with new data when the reference count(s) reach a particular value indicating to the control system that the print job or portions of the print job are no longer write-protected. As a result, memory capacity for print jobs (up to twice the memory capacity of conventional printing devices) and print speed performance improvements are realized over conventional printing devices.