I agree that a usb stick works, but it requires some vigilance on the part of the user, and you wind up with old copies. Say for instance I copy a drawing file off the desktop onto a thumbdrive, then copy it onto my laptop and edit it. I have to then copy it back, answering questions about whether to overwrite the old and whatnot, and do it again when it goes back on the desktop. This assumes I remember to grab that drawing file before I hit the road, which can easily happen when you are in one city one night thinking you'll be in the office the next day and instead you find yourself three states away having never darkened the office door. Regardless of where the data is stored, there's gotta be a foolproof way to keep it synched.