Digital image processing apparatus and method of arranging digital image files used by the same

A digital image processing apparatus capable of effective file management during the duplication and movement of a digital image file between digital image processing apparatuses, and a file arranging method used by the digital image processing apparatus. The apparatus stores a digital image file with a name including a serial number under a folder with a name including a part indicating a manufacturing company and a serial number. When the apparatus duplicates or moves a first digital image file stored in a first digital image processing apparatus to a second digital image processing apparatus, the digital image processing apparatus compares a name of a folder containing the first digital image file with a name of a folder of the second digital image processing apparatus, duplicates or moves the first digital image file to the folder, or generates a new folder and duplicates or moves the first digital image file to the new folder.