Don't they both deal with the directory in a different manner? I just received my free upgrade copy of TT4 and am waiting to do a full backup before running through the tests. TT4 doesn't seem to have the ability to see what shape your directory is in, by way of a graph,before actually replacing it. DW (at least 2.x) did. Micromat has also updated Drive 10. Why are they working on a product that TT4 has replaced? Does Drive 10 do something TT4 doesn't?