Works great except won’t work on external storage

I bought this program and it works very well. However when I scan an external or network drive (WD MyCloud), WD My Passport) it won’t delete any of the duplicate files. It will find all of the duplicate files but when you select them all, then select to delete them it won’t delete the files and says 0Kb cleaned. If I could figure out how to solve this issue I would have rated this 5 stars. Seeing that most of my media is on an external hard drive I can’t support a great rating for this.

houseofpayne03 about Duplicate File Cleaner - Find and Delete Your Duplicates