This is a basic backup and restore program which simply copies your data to or from another drive. It is useful if you have a removal drive such as a Zip or Zap drive or if you have a Local Area Network. If you have a tape backup system, you would use the software that came with the tape instead of or in addition to this utility.
Click on the arrow to the right of the drive symbol to bring up a list of available drives. The click on Backup to copy your data to that drive or on Restore to copy data on that drive back over your program. You should not choose Restore unless there is something wrong with your working data as it will overwrite your data with the copy from the other drive.