Synology Releases DiskStation Manager 7.3 NAS OS

Synology, Inc. announced the release of DiskStation Manager (DSM) 7.3 NAS OS, delivering enhanced storage efficiency, strengthened security and reliability, and new productivity features.

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“As data grows rapidly, advanced solutions are needed to manage, process, and unlock its full value,” said Kenneth Hsu, director, system group, Synology. “DSM 7.3 helps customers confidently address evolving data management challenges on a platform that is secure, reliable, and ready to support AI transformation.”

Enhanced storage efficiency, system security, and collaboration capabilities
Synology Tiering automatically manages files between storage tiers based on access patterns, keeping frequently used ‘hot’ data on high-performance storage while shifting rarely accessed ‘cold’ data to cost-effective tiers. With customisable policies based on modification time or access frequency, users can precisely schedule when and how data movement takes place.

Security has always been the top priority in DSM development. Over the past 12 months, DSM has received more than 50 proactive security updates. In DSM 7.3, security is further reinforced with the adoption of industry-recognised risk indicators, including KEV, EPSS, and LEV, for stronger threat prioritisation and protection.

Office Suite has also undergone significant upgrades to meet the community’s growing needs. Synology Drive introduces shared labels, streamlined file requests, and enhanced file locking to facilitate team collaboration. Meanwhile, MailPlus further strengthens security with email moderation and adds domain sharing to unify identities across distributed infrastructures.

Empowering AI adoption with data privacy
Synology AI Console has been deployed on more than 430,000 Synology systems since its launch in August, 2025, enabling AI-powered team collaboration and management in on-premises environments. In DSM 7.3, AI Console further introduces custom data masking and filtering, allowing users to safeguard sensitive information locally before transmitting data to 3rd-party AI providers, enhancing both security and workflow reliability.

In addition, the AI Console will soon add support for all OpenAI-compatible APIs in future releases, enabling integration with private AI infrastructure and giving organisations the flexibility to deploy AI services with full data privacy and security.

Expanded storage flexibility
Synology is committed to delivering reliable, high-performance storage systems. Rigorous validation of both hardware and software components has long been a core development priority. The company’s storage drives, together with the 3rd-party validation program, are engineered to provide the highest levels of reliability with DSM.

Synology is collaborating with drive manufacturers to expand the range of certified storage media, delivering more reliable options. At the same time, 2025 model-year DiskStation Plus, Value, and J Series running DSM 7.3 will support installation and storage pool creation with 3rd-party drives ⁽¹⁾. Together with the existing support for 3rd-party drive migration, DSM will provide users with greater flexibility in managing their storage deployments.

Availability:
DSM 7.3 NAS OS is available for download. Detailed information on the updates, refer to the release notes. Updated drive compatibility policy, read this article.

⁽¹⁾ Creation of M.2 based storage pool and cache still requires drives on the HCL.