Room to operate

      In simple terms, your PC needs room to operate efficiently. Ideally half of your hard drive should be the data mark. However up to two thirds is acceptable.
      I have exceeded that amount so I have to go through and discard unneeded files, along with duplicate files. Real easy to get several copies of the same pictures under different names. As far as I know there isn't a program free or otherwise that will do it with any real accuracy.
     If you know of one, please leave the name of it in the comments area.