Perhaps as a certified Old Grouch(tm) I'm merely being paranoid in that I use a three step approach to this problem: 1. local project; 2. backup project to thumb drive; and 3. backup project to the cloud. Of course there is a reverse approach to synchronize accordingly. I also would like to see some attention paid to the traditional problem of "Who's on first" that invariably arises when number of participants is greater than 1...