What is VDF ?
It's a program to easily find and delete duplicate files, songs and photos on your computer..
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So, what's the problem with duplicates? isn't the storage cheap nowadays ?
There are more problems caused by duplicates other than wasting your storage space. Here are some examples :.

Playing the same songs over and over again.
Print the same photos in your photo album.
Put the same picture on your website gallery.
Display the same images over and over again on slideshow.
Windows Explorer is getting so slow because there are so many files in a folder.
Backup time is getting longer.
When you do backup, duplicates are copied thus wasting more space than before.

Download Vistanita Duplicate Finder v3.9.6