I have OMV on a Raspberry Pi 3 which is always on (box A).
I also have OMV on a HP microserver which is sometimes on (box B).
Both are on my home network. I'd like a few folders on box A to be automatically backed up to box B, whenever box B is turned on.
I thought Syncthing would suit but I don't want deletions replicated from A to B.
What would be my options for this task?
Thanks for your time.