I have an external hard drive connected to a computer. I want to see if NTBACKUP can backup the My Documents of the computer. I would like it to backup to the drive and either append or overwrite the media when the hard drive fills up. For example, I would always want two weeks of data on the hard drive. Is there any way that I can get NTBACKUP to do this? If not, is there a free utility or software that can do what I want? Thanks.