I have a synology ds1512+ onsite with about 300 gb of data. I have a Synology ds214se offsite. Currently I use FTP to back up one to the other once per night. I would like the servers to sync so that when edits are made to the one offsite, they are made onsite and vise versa. I do not want to utilize Cloudsync or Cloudstation for this job as it is unreliable. We can work via teamviewer.