To exclude an opportunity of pictures duplication use the module "Duplicates searching"

 

In viewer window open the folder in which you want to search duplicates, and press Search button. Program will analyze all graphic files in this folder and in its sub folders, if you check Include subfolder option, then show duplicates list. The groups of duplicates are colored in different ways. You can review searching pictures and set ticks in a Del field opposite pictures which are necessary to be removed. Then press Delete selected button and all chosen images will be removed directly from the disk.