In order to sync folders between 2 Synology NAS only few steps are needed. We will refer to NAS 1 as local nas and NAS 2 as remote NAS. The two NAS systems will be configured for a bidirectional sync. Changes made on one NAS will be reflected on the other and vice-versa.

We will use the Cloud Station ShareSync app from Synology

  1. create a shared folder on remote NAS.
  2. make sure to set the apropiate permissions
  3. install and run Cloud Station Share Sync on local NAS
  4. configure the connection

    Synology configure sync backup connection
    Synology configure sync backup connection
  5. select remote folders to be synchronized. You can choose the one configured at step 1 or any other shared folder that is accessible with your account

    configure Synology NAS sync task
    configure Synology NAS sync task
  6. this will offer a very simple way for files and folder sync between two Synology NAS systems
  7. when everything is configured, one new task will be present on top barsyncTask


Depending on your Synology NAS system version you might need to install a different application. The other solution for synchronizing two synology NAS can e found at