I have yet to be nagged. Besides, I am sure the company pays a lot more than $19.95 for you fighting to accomplish flawless file transfers. $19.95 is not a lot of money for a big business.

It effectively asks you on the window "What do you want me to do if the file already exists in the target directory?" I have mine set to "Always Ask" currently.

It is very fast. It displays the results. You can even verify the copies byte by byte after it is done.

I was using 7-Zip File Manager to try to backup file directories. It was giving me fits. Then, I found Teracopy after doing a Google search to try to improve my quality of life.