Now that I have changed back to Disk Director 9, I can report a minor problem with Disk Director 10. I Xcopy my data files for daily backup to another computer. I only map the drive letters when I need them: net use r: \\Thinkpad\1_O_IBM net use s: \\Thinkpad\1_N_IBM When I finish the process, I remove the mapped drive letters: net use r: /delete net use s: /delete This works with no problems under DD 9. Under DD 10, it appears that certain files are being held open on mapped drives. When I try to un-map those drives, I get a message similar to this: "There are files or directory searches open on this drive. Are you sure you want to remove the mapped drive letter? (Y/N)" This makes me unsure if it is safe to un-map the drive letter. I also have to press "y" and "Enter" for each of the ten mapped drives. This is just a minor annoyance with DD 10 that does not exist under DD 9.