Copying files/folders duplicates the folder in PHP

I'm trying to copy all folders (Agents & Blogs) from a source to a destination but I keep getting this error.

    $fp = new Filesystem();
    $fp->copyDirectory(storage_path('files/images'), public_path('images'));

mkdir() device or resource busy

PS: I'm doing all this in a laravel seeder file

via Chebli Mohamed