A printing apparatus connectable with an external storage device is provided. The printing apparatus includes a printer unit to execute a printing operation to print an image in a current print job, a print log provider to provide a print log, which indicates a record of the printing operation for the current print job, to the external storage device, a print log obtainer to obtain a preceding print log, indicating a record of an earlier printing operation executed earlier in the printing apparatus, provided to and stored in the external storage device, a print log examiner to examine the preceding print log and determine normality of the preceding print log based on the record of the earlier print operation, and a controller to permit the printer unit to print the image and restrict the printer unit from printing the image depending on normality of the obtained print logs.