Steps - Learn how to create a windows service - Learn how to use Process - Figure out how to manage files and specifically detect time changes and how to copy. - Figure out how the cad app 'saves' a file Last step is more experimental. You should probably save two back ups and alternate as that gives a better chance of one not be bad due to a copy during a write. Last step also involves figuring out where the file is saved and to which user it belongs. mphill4744 wrote: Users currently work on the files on a blade server This of course is all dependent on the presumption that the 'server' is in fact windows.