To manually install Resilio Sync, mount DroboApps share:
If you're on a Mac:
- open Finder -> Go -> Connect to server (or use Cmd+K shortcut), enter the server_address/DroboApps, provide credentials for access.
If you're on Windows:
- From Windows Explorer pick to Mount netwrok drive and enter Drobo's address. Provide credentials if asked.
Else, you can use ssh connection to Drobo's Terminal.
3. Download the tar archive from below the page and put it into the mounted directory.
4. Reboot Drobo.
Follow steps 3 and 4 to update Sync.
Installing from Drobo Apps
The steps below describe installing Resilio Sync from Drobo App Store. Note, that it's not always the latest version that is published in Drobo's Apps center.
Step 1
Go to the Drobo Apps section within the Drobo Dashboard, select Resilio Sync, and click Install.
Step 2
Click the "Configure" button once the app has been installed. After that click Open to open the WebUI.
Step 3
Set up login and password and select the usage: personal or business. Sync Home can be used Free of charge. Sync Business requires a license. Read more. 
Important Note
- It is highly recommended to save all synced folders inside of a share so they are accessible through the Finder (OS X) and Windows Explorer (Windows).