Here is my setup: I am running TI 10. I have 2 hard drives -- one for OS and programs, the other for data. I also have 2 external USB hard drives, which I have designated in Acronis as backup locations -- one for each of my internal hard drives. Additionally, I have established tasks to run (unscheduled -- only when I specify). Each backup task is supposed to run a FULL backup, then 5 DIFFERENTIAL backups, then start the cycle over again with another FULL backup. Well.... the first backup was a full backup, as expected. But I am now up to 7 differential backups on top of my first full one -- why did the task not start over with a new full backup after making 5 differentials as specified? I entered the "Edit" task routine to check all of my settings -- and I do indeed have the tasks set up just as I described above. So... why isn't it working that way? Anybody? Help?! Rick A.