Save Selected Files ...

    Choose "Save Selected Files ..." when you want to perform backup
    operations on a group of files and not an entire disk.  The disk from
    which you are saving files must be locally accessible.   There are
    three selected-file operations in a list box from which you can choose:

      Save selected files as a snapshot of the files - This creates a
      copy of the file you specify but subsequent incremental backups
      cannot be done on a snapshot backup.

      Save selected files as a baseline for incremental backups - This
      creates a copy of the files you specify and records the file data
      so that incremental backup operations can be performed on that
      same group of files.

      Save an incremental backup of selected file - This creates a copy
      of files that were created or modified since the previous
      incremental or the previous baseline backup operation of the
      selected group of files.