Synology Mirror Folder: How to Automatically Mirror Files to Synology NAS

Manually syncing files between your computer and Synology NAS can quickly become frustrating and risky. The same applies to syncing between NAS devices or two local folders. Many users searching for “Synology mirror folders” are actually just looking for an automatic way to keep files identical across devices.

The problem is that Synology offers several apps for sync and backup, and not all of them create a true mirror. In this guide, you’ll learn which tool works best for different scenarios and how to automatically mirror files to Synology NAS step by step.

Which Tools Are Best for Synology Mirror Folder?

Synology provides several tools for file synchronization and backup, but each solution is designed for different purposes. Some focus on collaboration, while others are better for disaster recovery or exact folder replication.

Choosing the right method depends on whether you want real-time sync, one-way mirroring, or NAS-to-NAS replication.

👍 Top recommendation:

• Best overall (easiest) - AOMEI Backupper
• For Synology users, try Shared Folder Sync (NAS to NAS).
• For everyday users, consider trying SynologyDrive.

Automatically Mirror a Folder to Synology NAS on Windows

AOMEI Backupper Professional is a reliable folder sync software for Windows 11, 10, 8.1, 8, 7, which allows you to mirror a folder to Synology NAS in simple clicks. Changes made to the folder are automatically synced to Synology NAS, but not the other way around.

In addition, it still offers users different sync options, such as daily, weekly, monthly (by date), event triggers, etc. You can choose one based on your preferences. With the mirrored copy, you can easily recover deleted or lost folders due to accidental deletion, system crashes, virus infections, and other causes.

Step 1. To mirror a folder to Synology NAS on Windows without any obstacles, you need to prepare a shared folder and set full permissions to access it.

• Right-click the folder you want to access on the Synology NAS and select Properties.
• Then, under the Sharing tab, click Advanced Sharing.
• Check Share this folder, then click Permissions to grant full permissions.

Step 2. Open AOMEI Backupper after installing. Under the Sync tab, click Mirror Sync.

Step 3. Type a unique name for Synology mirror folder. Click Select Source > This PC and select any folder you want to sync and click OK. Then, click the PC icon > NAS> Add NAS and enter the Synology NAS path to add it. You can then select a previously shared folder on this NAS.

Step 4. To mirror a folder to Synology NAS automatically, click Schedule Sync to enable daily, weekly, monthly (by date), etc, and click OK. You can also enable email notification to get timely notifications.

Step 5. At last, confirm your sync settings and click Start Sync to mirror a folder to Synology NAS automatically.

Mirror Folders Between Two Synology NAS with Shared Folder Sync

To mirror folders between two Synology NAS, you can consider using Shared Folder Sync or Synology Drive Share Sync if you prefer native tools. The first option uses the rsync protocol to create exact copies, ideal for scheduled backups, while the second is more suitable for two-way synchronization or when file filtering is required. Here take Shared Folder Sync as an example:

Step 1. Before starting the sync task, make sure both Synology NAS devices are connected to the network and running properly. You need to create a shared folder with full access permissions.

Step 2. Sign in to your destination NAS. Open Control Panel > File Services > Sync and check the Enable rsync service. Then, click Apply.

Step 3. Sign in to your source NAS. Go to Control Panel > File Services > Advanced > Shared Folder Sync > Task List.

Step 4. Click Create.

Step 5. Name the task and select the shared folder(s) you want to sync. Enter the IP address or domain name (in FQDN format, i.e., www.synology.com) of the destination NAS, along with administrator credentials.

Step 6. Set up your sync settings, such as enable encryption, block-level synchronization, etc.

Step 7. Select when to sync - on modification, manually, or use advanced schedule -click Schedule Plan to specify.

Step 8. Review your settings and click Apply > Done to sync files from one NAS to another.

Shared Folder Sync vs AOMEI Backupper: Synology Mirror Folder

Conclusion

Synology provides users with multiple tools, but not all of them support mirroring. You can try Shared Folder Sync, Synology Share Sync, Rsync, but there are some differences between them.

• Shared Folder Sync: Purely one-way mirroring backup, NAS to NAS
• Synology Share Sync: Two-way mirroring, NAS to NAS, support file filter
• Rsync: For advanced users who are familiar with command lines

In addition, you can use reliable file sync software for Windows - AOMEI Backupper. It provides users with simple, intuitive interface, multiple sync solutions, schedule sync, etc., and supports different sync between devices, from local folder to NAS, NAS to NAS, NAS to PC, etc.