Is it possible to have a program running, so that whenever a change is made on a usb drive, it is updated on a hdd? Eg. I have my USB stick plugged in - and I save a word document to it. What I want to happen, is that a program realises I've saved a file on the usb stick, and makes a copy on my hdd, so that if the stick is lost, I have EVERYTHING backed up as at last save (a lot of uni stuff on it). The only thing I can think of that may cause problems, is that I quite often do work on a laptop on the train home, so when I plug it in, would it automatically detect changes in files, and update them? I'd search for it, but I have no idea what to search for. Can you help?