How to Sync 2 Synology NAS over Internet (2 Ways)

This article covers two methods to sync 2 Synology NAS over internet. Read through it to get a full guide on NAS-to-NAS sync over network.


By Jonna Updated on October 12, 2023

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Can I Connect 2 Synology NAS Together?


I do most of my work at Synology A, and I would like the files on Synology A to be available on Synology B when accessing it. An example of this situation would be myself working on say a .PSD file from Synology A, saving it, and then calling up Bob with Synology B and telling him he can open that PSD I just saved and continue working on it. Is this possible? Thanks!

Sync 2 Synology NAS over Internet

Network Attached Storage, commonly known as NAS, is a storage solution that integrates with a network, distinguishing itself from conventional computer-based storage. As one of the best branded NAS devices, many businesses and organizations often use Synology NAS to store large amounts of data. And many individuals seek to do NAS-to-NAS sync across two or more NAS devices, whether for collaborative efforts or safeguarding against data loss. But how to make it happen?

One of the best solutions is to sync 2 Synology NAS over internet. Here, we will delve into the process of syncing one Synology NAS to another over network. Keep reading to get more details.

Benefits of Syncing 2 Synology NAS over Internet

Copying a folder from one Synology NAS to a USB drive and subsequently pasting it onto another Synology NAS can indeed be accomplished manually. However, this method demands your active involvement in file transfers, especially when changes occur.

Letting Synology sync 2 NAS over internet makes things easier. And you don’t need a removable storage device, any changes in the source Synology NAS can be auto-synced to the destination NAS.

Way 1. Sync 2 Synology NAS via Synology Drive Server over Internet

Synology Drive Server offers an all-encompassing solution for file storage, management, sharing, and synchronization. It encompasses three vital components: the Synology Drive Admin Console for centralized control and monitoring, Synology Drive for web portal-based file access, and Synology Drive ShareSync for seamless synchronization between Synology NAS devices.

★Before embarking on the process of syncing 2 Synology NAS over internet using this tool, it is imperative to ensure the completion of the following prerequisites:
Synology Drive Server, which can be obtained from the Package Center, should be installed on all the Synology NAS devices you intend to synchronize.
The shared folders earmarked for synchronization should be designated as Team Folders in the Synology Drive Admin Console on the remote Synology NAS. For a step-by-step guide on how to enable a Team Folder, you can refer to the relevant article.
To create Synology Drive ShareSync connections, it is essential to sign in to the local Synology NAS using an account associated with the administrator's group.

Step 1. Open Synology Drive ShareSync on your local Synology NAS. Enter the IP address, username, and password of the remote Synology NAS.

Connect Remote Synology NAS

Step 2. Choose the shared folders you want to sync, both on the remote and local NAS. Enable the synchronization by ticking the checkbox and then click Next and subsequently Done.

Select Remote Folders

Step 3. Once the setup is finalized, a new connection will be visible on the left panel within Synology Drive ShareSync.

Step 4. If desired, you can create additional synchronization tasks with the connected Synology NAS. To add another Synology NAS, simply click the + symbol in Synology Drive ShareSync and follow the same steps as outlined above.

Way 2. Auto Sync 2 Synology NAS over Internet with Free Sync Software

While Synology Drive Server is adept at synchronizing data between Synology NAS devices, navigating the intricate IT landscapes of businesses can prove challenging. In cases where other NAS brands like QNAP and Buffalo, or even unsupported file servers come into play, the capabilities of Synology Drive ShareSync may fall short, needing another solution.

AOMEI Backupper Standard is a professional file sync solution for NAS, which is not limited by the brand so it is another best way to sync two Synology NAS easily.

💚 You have the flexibility to establish a sync schedule for automated synchronization, whether on a daily, weekly, monthly, or other basis.
💚 This solution extends its support to a wide array of NAS devices, including but not limited to Synology, QNAP, WD, Seagate, Buffalo, and more.
💚 In addition to sync over network, you can also sync Synology NAS to external drive, USB flash drive, OneDrive, Google Drive, Dropbox, etc.

Download and install AOMEI Backupper to enjoy it. For server users, please try Server edition. And follow the guide below to learn how to sync two Synology NAS:

Download Freeware Win 11/10/8.1/8/7/XP
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Step 1. Begin by launching the software on any computer within the same local area network, go to Sync, and choose Basic Sync. (Basic Sync means to one-way sync changed files from folder folder A to folder B)

File Sync

You can also upgrade to Pro version to get more sync options:
>> Mirror Sync refers to making folder B identical to folder A. Changes made to folder B solely will be reversed at the next sync.
>> Two-Way Sync means syncing changed files from folder A to folder B and vice versa.
>> Real-Time Sync can help you sync changed files from folder A to the destination folder B in real time.

Step 2. Select Add Folder > Share/NAS > Add Share or NAS Devices to input the login credential of Synology NAS. Then click OK to confirm and select a folder as the backup path.

Share Nas

Step 3. To sync with another NAS, choose Add Share or NAS Devices in the drop-down menu of the destination bar, and add your target NAS in the same way.

Add Destination

Step 4. Set up an automatic synchronization frequency by selecting Schedule Sync. When you're ready to initiate the synchronization, click Start Sync, and the process will commence.

Schedule Settings

★Useful tips:
With the Optionsfeature, you can write comments for your synchronization tasks, making it easy to discern the specific contents of each task. You can also enable email notifications here.
If you want to protect your NAS data, you can rely on the Backup function of AOMEI Backupper to backup NAS to external disk, local disk, cloud drive, and so on.
You can add and manage multiple network shares or NAS devices in Tools > Storage Management.

Final Thoughts

To sync 2 Synology NAS over internet, you can follow the guidance provided in this article. If you have multiple folders to be transferred between devices, you can choose the free and reliable file sync software AOMEI Backupper Standard to help you.

This tool can not only sync your NAS devices but also sync folders between different computers. Additionally, it serves as a comprehensive tool to safeguard your Windows computer. This includes features such as disk backup, system backup, disk cloning, partition cloning, and more, ensuring robust data protection and system redundancy.

Jonna · Editor
Jonna joined AOMEI in 2021 and has become a professional in the areas of computer backup and restoration, disk cloning, file synchronization, etc. She maintains a keen eye for the latest technology trends, ensuring that the information provided is always in step with industry developments.