Let's say you started to copy on order of 50,000 files to a directory. It starts processing about 25,000 files and then you decide to cancel the copy and you press the "Stop Copy" X button. Does that action rollback everything to just before you began the copy? Or do the first 25,000 actually get copied over to the destination directory? Or do the first 25,000 files get stored in some temporary cache directory somewhere? I am pretty sure the answer to the second question is No. But I am not sure about the first or the third.