Download and update Synology DiskStation NAS to DSM 7.3

On October 8, 2025, Synology released DiskStation Manager (DSM) 7.3. This ensures smarter storage management, improved security, and new productivity tools for businesses and home users alike. Therefore, in this article, I will show you the steps on how to download and update Synology DiskStation NAS to DSM 7.3. Please, see how to patch Veeam Backup and replication 12.3.2.3617 to 12.3.2.4165, and how to configure Active Directory-Based Activation (ADBA) for Windows.

Data is growing at an unprecedented pace, and users need solutions that help them manage, process, and unlock its full potential,” said Kenneth Hsu, Director of the System Group at Synology. For the release note, please see this link.

This update addresses multiple security vulnerabilities. DSM 7.3 drops support for Node.js v14, Node.js v16, PHP 7.3, PHP 7.4, and PHP 8.0. To maintain compatibility, DSM automatically updates installed packages to supported versions. For packages that are no longer supported such as exFAT, you must manually remove them before updating.

Also, see How to set up and configure the Key Management System (KMS), and how to add additional CC400W Cameras to Synology Surveillance Station

Synology DSM 7.3 Features

DSM 7.3 equips our customers to handle evolving data challenges on a secure, reliable platform that is ready for AI transformation. Below are some of the new features of DSM 7.3. Here is how to Resize or Expand Proxmox Hard Drive

Flexible Storage Made Easy

Synology continues to provide high-performance, reliable storage systems. The company rigorously tests and validates both hardware and software components, ensuring that DSM users enjoy consistent reliability. Synology is collaborating with third-party drive manufacturers to accelerate testing of additional drives. Take a look at the compatibility policies from this link.

Meanwhile, 25 DiskStation Plus, Value, and J series models running DSM 7.3 support the installation and storage pool creation of non-validated third-party drives. This flexibility allows users to expand their storage while Synology continues to grow its list of officially verified drives.

Smarter Storage Efficiency and Collaboration

DSM 7.3 introduces Synology Tiering, which automatically moves files between storage tiers based on usage patterns. Frequently accessed “hot” data remains on high-performance drives, while rarely used “cold” data moves to cost-effective storage.

Users can customize policies based on modification time or access frequency to control exactly when and how files migrate. Synology now employs three risk indicators which are KEV, EPSS, and LEV to help protect users from emerging threats.

Collaboration tools get a major update as well. Synology Drive adds shared labels for easier file organization, streamlined file requests, and file locking to prevent editing conflicts. MailPlus enhances security, introduces email moderation, and supports domain sharing for unified identity management across distributed infrastructures.

Here is How to Backup MacOS to Synology NAS via Time Machine, and Step-by-step guide on how to set up the Synology DS923+ NAS.

AI-Ready Features with Data Privacy

Since its launch in August 2025, Synology AI Console has been deployed on over 430,000 Synology systems, enabling AI-powered collaboration and management on-premises. DSM 7.3 adds custom data masking and filtering, so users can protect sensitive information locally before sharing it with third-party AI providers.

Synology plans to expand AI integration further by supporting all OpenAI-compatible APIs, giving organizations flexibility to deploy private AI services while maintaining full control over data privacy and security.

Please, see DSM Security: How to Protect Synology DS923+ NAS, how to fix IP Address blocked on Synology NAS due to forgotten Password, and how to Create New Users and Join Synology NAS to Active Directory.

Download DSM 7.3

To download DSM 7.3-81180, kindly use the following Archive (link). Then from the official Synology Archive, download for your NAS model. In my case, it is DS923+ and this might be different for you.

Update DiskStation to DSM 7.3-81180

Navigate to Control Panel and then to “Update & Restore”. Click on Manual DSM Update as sown below.

Click on browse to select the file you have downloaded above.

as you can see, I will select the file and click on Open.

To proceed with the update, click on Ok.

Note: Roll back is not possible to an earlier version upon installing this update.

The file is currently being uploaded.

Please, see how to update Proxmox VE 9.0 now Supported by Veeam, Logon Failure: User has not been granted the requested logon type, and the ‘Server Certificate could not be updated: Private key does not match“.

Accept End User License

In this step, check the box to select you have read and agreed to Synology End user License Agreement and click on OK.

If you have SAN Manager installed, you will be prompted to disconnect the targets. Click on Ok and proceed to disconnect the iSCSI targets.

As you can see, I have proceeded to my Windows Server and have discounted the Targets.

On the update notice, please attention. Based on the packages installed on your Synology DiskStation, these messages will be prompted.

Select I understand and agree to update the system and click on “Update”.

From another Synology NAS. As you can see, the update notice differs based on installed packages. Click on update to proceed.

On the DSM update prompt, click on OK. This shows the duration of the update.

As you can see, it is 60 percent complete.

Shortly, the Synology NAS will be restarted.

Please see Step-by-step guide on how to set up the Synology DS923+ NAS, and Cyclic Redundancy: Resolve Data Error on Inaccessible Hard Drive.

Updating packages

As mentioned above, to maintain compatibility. DSM automatically updates installed packages to supported versions.

Updating Antivirus Essentials

The replication Service is being updated

Snapshot Replication is being updated

Verifying Installed DSM 7.3 Update

To verify that the DSM 7.3-81180 update is indeed installed on your Synology NAS device. You have to sign-in. You will be prompted to if you are using quick connect. Please, see how to fix Synology NAS Quick Connect is not enabled issue

As you can see, we have successfully installed DSM 7.3-81180 on our Synology NAS System.

Uninstall exFAT

As displayed during the update notice above. We were told to uninstall exFAT that it is no longer supported. To do this, navigate to the Package Center and have it uninstalled.

Select the package and click on uninstall as shown below. When prompted, click on Yes.

Reconnect iSCSI Target

Now that the update is complete, I will proceed to my server, and under Tools. I will launch the iSCSI Initiator and reconnect my desired Target(s).

I hope you found this article very useful on how to download and update Synology DiskStation NAS to DSM 7.3. Please, feel free to leave a comment below.