Looks like a file synchronization solution (Windows XP)

Tristank mentioned a Powertoy that sounded interesting, SyncToy for Windows XP.

(An aside...I think it's odd that back when hard drive space was limited and expensive, I'd download anything that caught my interest...and now that I have lots of inexpensive storage space, I'm much more particular...)

The marketing-speak didn't quite sell me, so I went for SyncToy's documentation first. Right up front was a scenario that I could identify with:

"For instance, imagine you have pictures on one computer (perhaps your desktop computer), and pictures on another computer (perhaps your laptop). Quite a few of the pictures are already on both computers, but you do not remember exactly which ones are on both. You may want to get all the pictures on both computers. You could use Windows Explorer to copy all the pictures from one file to another, but simply copying all the pictures from one computer to the other has several shortcomings. One is that files that already exist on the other computer will be copied again, wasting time, disk space, and network bandwidth. Another issue is that you may have renamed some or all of your pictures from the names the camera generated to names based on the content, such as renaming HHOD4217.JPG to GrandCanyon.jpg. In that case, if the other computer already has HHOD4217.JPG, considerable time and disk space can be saved by recognizing that it is the same picture. SyncToy automatically renames the numbered file name to GrandCanyon.jpg on the other computer for you, and saves you the trouble of renaming the file manually."

Now that is a situation I've been in (okay, I'm still in it and I honestly intended to reconcile all my photos one of these days). So I'm going to install SyncToy and live up to my good intentions.

I'm also making note of how my perception of the product changed when presented with a realistic scenario that mirrored my needs, so I can think about how to do more of that in the documentation for the next version of DPM.