How to do one way sync

@jjvierra: That isn't possible. All sync methods are designed to be bidirectional, so that changes on each device propagate to all the others. We don't plan on doing something like having one device that is the only one where changes can be made, but I am curious about the use case. You can, however, start with a single vault on one device, and then sync it to the others. But unless you disable sync entirely after that, changes will continue to sync across all of them going forward.