How to organise out an absolute mess of file types with duplicates, versions, and temporary system/app files

I've decided to take on a project at work which involves sorting through the contents several HDDs and organising them into usefully navigable folders. The HDDs were used as backup for photos and video. They include several file types, but I'm only interested in saving the media files- a mixture of images and video. Photo and video files - comes in multiple formats: JPGs, TIFs, PSDs and various proprietary camera manufacturer formats (.CR2, .NEF, .ARW, etc.) I'd like to end with 2 folders: 1. \_ALL IMAGES 2. \_ALL VIDEO All other files can be deleted. Is there some software that can list ALL files on a directory and sort by file type so it would be easy to move into the above folders? Or is there a better way?