Do not cut and paste. COPY and paste. This way you won't lose files. Folks seem to have to learn this lesson first hand. There are far too many causes for this one but avoiding it is simple.
I try to cut a directory with files and paste it to another drive. After paste the directory is there, but empty, no files. The original directory is gone, the files too. Trying to recover deleted files does not give any result, there are no deleted files on the original drive, also not on the new drive. Where have they gone? Any ideas or hints? This problem is steady on my stationary PC (AMD 8core, Win 8.1 64bit with all actual updates), it works fine on my laptop, all files are pasted in the new directory.