I have folders that change frequently during the day. I have recently purchased an external box that I put a left over 300 GB IDE drive in. now what I would like to do is create a mirror of those folders, In the new external box. So when I am finished the external box will have will have a constant up to date back up of the folders on my main drive. I have some doc stored on flash drives and other docs that dont change that often, so it is only these folders that need constant change. I dont want to degreed system performance. I am dealing with a 100 gigs but only a small portion gets changed at a time. I am using win 7. Amd kuma 7750 with a gigabyte mother board ga-ma770-ud3 Not sure what other information would be needed.

ssosix, Windows Backup, which can be configured to run on a schedule from the Backup and Restore menu in the Control Panel, can be set to only back up a single directory - however, you will need to install a separate backup utility in order to perform the sort of incremental backup you describe; i.e., that in which only certain files are updated.-Alex

There are several possibilities.http://www.microsoft.com/downloads/details.aspx?familyid=c26efa36-98e0-4ee9-a7c5-98d0592d8c52&displaylang=enhttp://technet.microsoft.com/en-us/magazine/2009.04.utilityspotlight.aspxhttp://www.mydigitallife.info/2007/05/07/robocopy-syntax-command-line-switches-and-examples/http://www.secondcopy.com/index.html?ref=adwords&campaign=Search&adgroup=ranking&ad=001&gclid=CM7K7cTAmZsCFRZCagodbCaoBgKerry Brown MS-MVP - Windows Desktop Experience

thanks i give these a try.

I am using synctoy and apperes to be doing the trick. thanks for the help.

You're welcome.Kerry Brown MS-MVP - Windows Desktop Experience