I'm doing some testing now from a Windows machine to an Android device, and an iOS device. We'll see what happens. Interestingly, there is a "backup" option on the mobile devices, but not on the computer. In essence, I bet "backup" is what I'd want, but from the computer to other devices. [edit] Of course: Deleted on PC with all read-only clients = deleted on clients. It is sync. So, now to figure out how to make a feature request.