An extension computing device connects to a printing device using a fast data transfer connector to enable additional functionality and capabilities to support the printing device. Print jobs and other tasks may be performed in the extension computing device so that the printing device addresses more important tasks in real time. The extension computing device receives and processes a print job without the need to engage the printing device or its engine. The print job then may be stored in the extension computing device until it is printed on demand by the printing device. Other applications also may be located in the extension computing device. An extension engine performs tasks to determine when to process the print job in the extension computing device. The extension computing device includes a processor, a print job manager, a storage, an operating system, and input/output capabilities.