Duplicate file problem

Recently, I encountered some problems in my laptop. I have some music files that I stored and suddenly, I'm surprised to see that it has its own duplicate files. I started to get annoyed with it because it messed up my files. I have no idea why it happened as like this and I'm clueless at all.

Upon checking my other stored files, I noticed that it's not just my music files has its own duplicate, but almost all my stored files. I started to delete it one by one, hoping that it will work. Well, it's gone when I delete it, but few minutes after when I open the folder and it's there again. I almost lost my patience on how I can solve this problem of mine. But with the help of my friend, she introduced me with these remove duplicates itunes, a software that will help to remove some duplicate files in your PC or laptop.
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