The Synology DiskStation DS925+ is a high-performance 4-bay NAS enclosure designed for small and medium businesses as well as power users who need secure, scalable, and efficient data management. With its powerful processor and Synology’s intuitive DSM (DiskStation Manager) software, it offers advanced storage solutions, seamless collaboration tools, and strong data protection — all in one reliable system.
The Synology 4-Bay NAS features a powerful AMD Ryzen processor, expandable ECC memory, dual 2.5GbE LAN ports, and M.2 NVMe SSD support—perfect for high-performance storage in business or home environments
2.5GbE connectivity and diverse storage options
The DS925+ features built-in 2.5GbE networking and supports both SATA flash drives and HDDs in 2.5″/3.5″ internal bays, as well as via M.2 slots for use as either cache or storage pools. The DS925+ achieves up to 522 MB/s read and 565 MB/s write speedsUp to522/565 MB/sread/write It features built in 2.5GbE networkingBuilt-in dual2.5GbEnetworkingAnd supports two M.2 NVMe slots for caching or storage pool creation2 x M.2NVMecache & storage pool
Consolidate your data with up to 80 TB of raw storage across 4 bays. Need more space? Add capacity with the DX525 for up to 180 TB of total raw storage.
The DS925+ supports up to 180 TB of raw capacity after expansion when using 20 TB drives4 bays80 TB
9 bays180 TB
Store, share, and protect
Manage all your documents, photos, and other files, back up applications and devices, and protect your assets with professional video surveillance.
Private cloud for seamless data access
Streamlined file management and collaboration
A private photo storage and management solution
Effortlessly back up and organize photos, videos, and other visual assets using intuitive management tools. Automatically organize your content into albums and create secure share links for stakeholders and teammates. Learn more
Boost team productivity with collaborative tools
Enhance workplace collaboration with Synology’s productivity solutions. Create, edit, and share documents across teams in real time. Host an on-premises mail server to provide web-based email access while maintaining full data ownership. Additionally, stay connected through secure one-on-one chats, public channels, encrypted private channels, and group conversations. Learn more
Multi-site synchronization to empower global workflows
NAS-to-NAS synchronization
Cloud-powered multi-site syncing
Empower global workflows with high-speed access to data from anywhere in your network. Our hybrid cloud solution caches frequently used files locally for rapid access, while less frequently accessed data is stored in the cloud, reducing your on-site storage requirements.
Sync to public cloud providers
Automatically keep data in sync between Synology NAS and major cloud providers, including BackBlaze B2, Dropbox, Google Drive, and Microsoft OneDrive. Multiple protocol support, client-side encryption, and customizable sync and bandwidth controls enable efficient storage management across various platforms. Learn more
Comprehensive data backup, protection, and recovery solutions
Back up PCs, smartphones, cloud apps, and more
Comprehensive and flexible Synology system backups
Protect all data, applications, and configurations on your Synology systems with comprehensive scheduled backups, including bare-metal backups, to local and remote servers, external drives, or cloud storage destinations, including Synology C2 Storage.Learn more
Tamper-proof protection with immutable snapshots
Safeguard critical LUNs and shared folders with automated immutable snapshots backed by custom retention policies. Built-in support for offsite replication further ensures robust business continuity. Learn more
Smart surveillance
Synology Surveillance Station
Dual recording to the cloud
Secure your surveillance footage with robust cloud backup that supports end-to-end encryption. Our cloud-based surveillance backup solution safeguards your Surveillance Station recordings, allowing you to access, view, share, and download footage through a convenient web portal. Ensure your data remains available even if your on-premises system is compromised.Learn more
Centralized monitoring and management
Monitor and manage your Synology fleet from a central interface, on-prem or in the cloud.
Performance backed by Synology drives
Designed for Synology systems, Synology drives deliver consistent performance and unmatched reliability for your deployments.
Supercharge your setup with Synology router
Pair your NAS with Synology RT6600ax or WRX560 to maximize 2.5GbE connectivity. Enjoy high-speed transfers and secure your network with VLANs, threat prevention, and web filtering — all through a familiar Synology interface.
Extended protection with Extended Warranty
The DS925+ is backed by Synology’s 3-year hardware warranty. An optional 2-year extended warranty is available in select regions to extend coverage to 5 years.
Hardware Overview
Compatible Synology Accessories
| DX525 | ||
3.5″ SATA HDD | Plus Series |
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| Enterprise Series |
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2.5″ SATA SSD | Enterprise Series |
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M.2 NVMe SSD | Enterprise Series |
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DSM Specifications | ||
|---|---|---|
| Maximum Single Volume Size |
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| Maximum Internal Volume Number | 32 | |
| M.2 SSD Storage Pool Support* | ||
| SSD Read/Write Cache (Determining cache size) | ||
| SSD TRIM | ||
| Supported RAID Type |
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| RAID Migration |
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| Volume Expansion with Larger HDDs |
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| Volume Expansion by Adding a HDD |
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| Global Hot Spare Supported RAID Type |
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| Notes |
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| Internal Drives |
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| External Drives |
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| File Protocol |
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| Maximum Number of SMB Connections (FSCT-Based) | 40 | |
| Windows Access Control List (ACL) Integration | ||
| NFS Kerberos Authentication | ||
| Notes |
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| Maximum Local User Accounts | 512 | |
| Maximum Local Groups | 128 | |
| Maximum Shared Folder | 128 | |
| Maximum Shared Folder Sync Tasks | 8 | |
| Maximum Hybrid Share Folders | 10 | |
| Folder and Package Backup | ||
| Entire System Backup | ||
| Synology High Availability | ||
| Syslog Events per Second | 800 | |
Virtualization | VMware ESXi 6.5 and VAAI | |
| Windows Server 2022 | ||
| Citrix Ready | ||
| OpenStack | ||
| Supported Protocols | SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV | |
| Supported Browsers |
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| Supported Language | English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svenska, Nederlands, Русский, Polski, Magyar, Português do Brasil, Português Europeu, Türkçe, Český, ภาษาไทย, 日本語, 한국어, 繁體中文, 简体中文 | |
| Notes | For an updated list of supported browser versions, check the DSM Technical Specifications. | |
Add-on Packages view the complete package list | ||
| Maximum Number of Users | 150 | |
| Notes |
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Download Station | Maximum Concurrent Download Tasks | 80 |
| Maximum iSCSI Target Number | 2 | |
| Maximum LUN | 2 | |
| LUN Clone/Snapshot, Windows ODX | ||
| Free Email Accounts | 5 (Additional accounts require purchase of licenses) | |
| Maximum Number of Users | 90 | |
| Notes |
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| DLNA Compliance | ||
| Facial Recognition | ||
| Object Recognition | ||
| Maximum Snapshots per Shared Folder | 128 | |
| Maximum of System Snapshots | 256 | |
| Default Licenses | 2 (Additional cameras require purchase of licenses) | |
| Suggested Maximum IP Cameras and Total FPS (H.264) |
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| Suggested Maximum IP Cameras and Total FPS (H.265) |
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| Notes |
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| Maximum Number of Users | 80 | |
| Maximum Number of Hosted Files | 500,000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above) | |
| Notes |
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| Maximum Number of Users | 80 | |
| Notes |
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| Recommended Virtual Machine Instances | 8 (Learn more) | |
| Recommended Virtual DSM Number (Licenses required) | 8 (including 1 Free License) | |
| Notes | The specifications vary depending on system configuration and memory size. | |
| Maximum Connections | 8 | |
Upgrade your data storage with the Synology DS925+ 4-Bay NAS Diskless Enclosure. Powered by a quad-core CPU and Synology DSM, it delivers enterprise-level performance, ideal for backup, media, and virtualization tasks.
Key Features
🖥 Powerful Performance – Equipped with a quad-core processor for faster file transfers and multitasking.
💾 4 Drive Bays – Supports multiple RAID configurations for flexibility and data redundancy.
☁️ Private Cloud Storage – Create your own secure cloud with Synology DSM.
🔐 Advanced Security – Built-in features protect against ransomware, unauthorized access, and data loss.
📂 Scalable Storage – Expand capacity as your business grows.
🌍 Cross-Platform Access – Access and share files from Windows, macOS, Linux, iOS, and Android.
🎥 Virtualization & Multimedia Ready – Supports VMware, Citrix, Hyper-V, and media streaming.
Why Choose Synology DS925+?
Ideal for file sharing, backup, and disaster recovery.
Reduces reliance on third-party cloud services by hosting your own.
Ensures business continuity and team collaboration.
Expandable storage capacity supports long-term growth.
Get the Synology DS925+ NAS with 5 drive bays for secure data storage. Powerful quad-core performance, scalable design, and diskless flexibility.
Synology DS925+ delivers reliable business data protection. Diskless 4-bay NAS with RAID support, cloud integration, and advanced security.
Buy Synology DS925+ diskless NAS. Fast quad-core CPU, DSM software, scalable storage, and private cloud features for work or home use.
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