I have encfs folder in Dropbox, works reasonably well, but I do not have any automatic process writing to this from two different machines, that may cause troub

I have encfs folder in Dropbox, works reasonably well, but I do not have any automatic process writing to this from two different machines, that may cause trouble. That gives me privacy and keeps the most important files always backed up. For a bulk backup, once per month I bring one of the 3 portable HDDs from another place, attach it to my server and start my custom backup script that saves encrypted zips of sensitive directories and rsync-backup of everything else to it. At any time 2 or 3 HDDs are outside the house.