I am confused and would like to know exactly how to do this. I want to perform one full image backup, lets say today, and from then on do a differential backup every day at 4pm. I expect this to take less space and time than always doing full images. When I first tried it I noticed Acronis kept saving each differential and eventually then I'd run out of space. The help desk gave me another option, but that seems to be doing a full image each day. Can anyone tell me simply how to do what I want?