Hi Ron, Perhaps setting up a folder action may be the way to go. I don't use Folder Actions personally, but I am sure that an Applescript can be created to copy modified files one way or the other. Any users familiar with Folder Actions with any comments? Mike >>>>> THANKS JERRY FOR THE BACKUP INFO... BUT as a user of two computers (with differrent operating systems -G4/G5) how do I on a daily basis at minimum keep all files synchronized? That is if I make changes in email and word and excel on my 12" and then I am on the G5 and make chages and download a Gizmo or two... how (what application do I use) to keep them the same? Thanks for any more suggestions. R