Printer

A printer configured to be connected communicably with a storage device, comprising:

• a printing unit configured to print one or more pages with images formed thereon, based on print data;
• a processor;
• and
• memory storing computer-executable instructions that, when executed by the processor, cause the printer to:
• create thumbnail image data corresponding to each of the pages to be printed by the printing unit;
• create a name for the thumbnail image data corresponding to each of the pages to be printed;
• store, into the storage device, the thumbnail image data with the created name attached thereto;
• determine whether the thumbnail image data has been successfully stored into the storage device;
• control the printing unit to initiate printing of a page corresponding to the thumbnail image data successfully stored in response to determining that the thumbnail image data has been successfully stored into the storage device;
• update the name of the thumbnail image data depending on whether the page corresponding to the thumbnail image data is successfully printed;
• and
• store the thumbnail image data with the updated name displacing the previous name, in the storage device when the name is updated.