Cannot create a folder as Windows says it already exists

Thanks, so it's only the "2016 Pics" folder that can be seen in Command, but not seen in File Explorer - right?

What this means to me is that "2016 Pics" really does exist, but is presented to File Explorer as a different folder name.

If you can match what Command sees to what File Explorers sees, you should be left with a mis-match

Command	Explorer
2013 Pics	2013 Pics
2014 Pics	2014 Pics
2015 Pics	2015 Pics
2016 Pics	newPictures

In the example above, newPictures is the overlay name of "2016 Pics"

It might be painstaking to match the folders one by one - hopefully there aren't too many or you find a mismatch quickly.

Once you identify the mis-match, then it's just a matter of figuring out the method of the overlay.