Shadow Folder Preparation
The default backup folder needs to be prepared for shadowing prior to first use.  The preparation process simply places a Shadow.ini file in the folder which is then used to store the date of the last successful shadow run.  The reason for having this manual preparation is to allow you to use your rewritable PD/CD ROM, optical disk or Zip drive etc. for both shadowing and other uses.  Unprepared disks will not be shadowed to but prepared disks will be automatically recognised and shadowing will commence.