Features:

• Capable Performance: Up to 278/281 MB/s sequential read/write throughput supports stable data transfers
• Fast Networking: Built-in 2.5GbE port for fast connectivity out of the box
• Versatile Network Storage: Leverage built-in file and photo management, data protection, and surveillance solutions
• Centralized Data Storage: Store up to 80 TB of data in one place, maintain 100% data ownership, and enjoy multi-platform access

Your Centralized Hub for Storage, Syncing, and Seamless Collaboration

The DS425+ delivers powerful functionality in a compact 4-bay, desktop-friendly design.Built-in 2.5GbE networking provides excellent network speeds out of the box. Powered by Synology DiskStation Manager DSM, the
DS425 serves as a versatile all-in-one solution for data sharing, synchronization, backup, and surveillance.

A Compact & Capable Storage Platform

The DS425+ provides intuitive and comprehensive file management, media organization, and backup capabilities. Its capable performance and compact size make it perfect for users with space constraints, including IT enthusiasts, creative professionals, and businesses of all sizes. It is an ideal edge device for branch offices or retail locations for small firms or large enterprises.

• Up to 278 MB/s sequential read and 281 MB/s sequential write performance1 enables fast file sharing, syncing, streaming, and backup for multiple users
• Includes one 2.5GbE port and one 1GbE port, providing fast networking with failover support
• Supports 4 * 2.5" SATA SSD and 3.5" SATA HDD. Synology hard drives and SSDs are designed to integrate seamlessly with Synology systems, delivering exceptional reliability
• Two built-in M.2 slots provide SSD caching without occupying drive bays

Ease of Use and Security Features

A suite of convenience and security features, combined with DSM's intuitive UI, ensures a seamless experience for users of all levels of expertise.

• Easily access your system from any web browser via QuickConnect
• Adaptive Multi-Factor Authentication AMFA triggers upon suspicious external logins,providing an additional layer of security
• Improve management efficiency with customizable delegation roles, allowing admins to quickly assign roles to non-admin users while restricting access to critical system settings
• Active Insight, Synology’s cloud-based fleet monitoring solution, leverages machine learning to detect malware and other malicious activity and automatically creates immutable snapshots to protect your data

Built-in Data Protection Solutions

License-free solutions help protect data and configurations on your Synology system, ensure maximum system uptime, and back up and restore all your devices, VMs, and cloud applications.

• Synology Active Backup Suite consolidates backup tasks and offers rapid restoration of Windows and Linux endpoints, VMs, Synology NAS, and SaaS applications
• Hyper Backup backs up your Synology system data to multiple destinations securely and efficiently with integrity checks and powerful deduplication, compression, and versioning options
• Snapshot Replication provides schedulable, near-instantaneous data protection with version control, ensuring that all shared folders and LUNs on your Synology system remain safe and available
• C2 Storage for Hyper Backup offers a dedicated secure public cloud destination for Synology NAS backup data

A Collaboration, Communication, and Organization Hub

Synology provides a private cloud solution for on-site and remote workers, as well as home users,to concurrently edit documents, share files, manage emails, send instant messages, manage photos, and more.

• Synology Drive serves as a centralized hub to keep your files labeled and organized for easy access, offering granular file sharing permissions and customizable security features to ensure file safety
• Synology Photos provides a comprehensive solution for storing, organizing, and sharing photos and videos, with powerful features suitable for both personal and professional use
• Synology Office enables users to collaborate on documents, spreadsheets, and presentation slides in real time, supported by convenient options such as file versioning for easy restoration and password protection
• Synology Chat brings teams together with one-on-one chats, group chats, and encrypted private channels over multiple platforms
• Synology MailPlus provides a secure, reliable, and private email server
• Synology Calendar helps teams keep track of priorities with convenient calendar sharing and scheduling
• Synology Hybrid Share enhances multi-site teamwork with a global hybrid cloud file system which combines the scalability of the cloud with the fast local access provided by Synology systems

Private Video Surveillance

Synology Surveillance Station transforms any Synology system into a powerful network video recorder NVR

• 8,700+ supported camera models
• ONVIF support for a broader selection of cameras
• Private, subscription-free storage of recordings
• Access through web browsers, desktop clients, and mobile apps
• Event-based rules to trigger specific actions
• Email, SMS, and push notification options
• Simultaneous recording to the cloud with C2 Backup for Surveillance for an extra layer of data protection and more convenient sharing

Technical Specifications

Hardware

CPU

• CPU Model: Intel Celeron J4125
• CPU Quantity: 1
• CPU Core: 4
• CPU Architecture: 64-bit
• CPU Frequency: 2.0 (base) / 2.7 (turbo) GHz
• Hardware Encryption Engine: Yes

Memory

• System Memory: 2 GB DDR4 non-ECC
• Total Memory Slots: 1
• Maximum Memory Capacity: 6 GB (2 GB + 4 GB)

Notes: Please select Synology memory modules for optimum compatibility and reliability. Synology will not provide complete product warranty or technical support if non-Synology memory modules are used for memory expansion.

Storage

• Drive Bays: 4
• M.2 Drive Slots: 2 (NVMe)
• Drive Type: 3.5" SATA HDD / 2.5" SATA SSD / M.2 2280 NVMe SSD

Hot Swappable Drive: Yes

Notes: 

• The hot swappable drive feature is not supported by M.2 SSD slots.
• Compatible drives are mandatory. Please Visit Brand compatibility list before purchasing hard drives.

External Ports

• RJ45 1GbE LAN Port: 1
• RJ45 2.5GbE LAN Port: 1
• USB 3.2 Gen 1 Port: 2

Others

• System Fan: 92 mm x 92 mm x 25 mm x 2 pcs
• AC Input Power Voltage: 100V to 240V AC
• Power Frequency: 50/60 Hz, Single Phase

Temperature

• Operating Temperature: 0°C to 40°C 32°F to 104°F
• Storage Temperature: -20°C to 60°C 5°F to 140°F
• Operating Humidity: 8% to 80% RH
• Storage Humidity: 5% to 95% RH
• Maximum Operating Altitude: 5,000 m

General DSM Specifications

Storage Management

• Maximum Single Volume Size: 108 TB
• Maximum Internal Volume Number: 32
• SSD Read/Write Cache Determining cache size): Yes
• Supported RAID Type: Synology Hybrid RAID,Basic,JBOD,RAID 0,RAID 1,RAID 5,RAID 6,RAID 10

Notes

• Each internal volume (may consist of multiple drives) is expandable up to 108TB.
• Actual maximum storage pool and volume sizes depend on drive sizes used, the number of drive bays available, and the RAID configuration.
• Usable capacity for each volume will be lower than the maximum volume size and is dependent on the filesystem and
• the amount of system metadata stored.
• Creating M.2 storage pools requires the use of Synology-verified SSDs, which are rigorously tested under extreme temperature conditions. Thermal parameters for SSDs and NAS units are fine-tuned to ensure optimal management of thermal conditions under I/O-intensive environments.

File System

• Internal Drives Btrfs,ext4
• External Drives Btrfs,ext4,ext3,FAT32,NTFS,HFS+,exFAT

File Services

• File Protocol: SMB,AFP,NFS,FTP,WebDAV,Rsync
• Maximum Number of SMB Connections FSCTBased): 10
• Windows Access Control List ACL Integration: Yes
• NFS Kerberos Authentication: Yes

Account & Shared Folder

• Maximum Local User Accounts: 512
• Maximum Local Groups: 128
• Maximum Shared Folder: 128
• Maximum Shared Folder Sync Tasks: 4

Virtualization

• VMware vSphere: ESXi 8.0 U2, ESXi 8.0 U1, ESXi 8.0, ESXi 7.0 U3, ESXi 7.0 U2, ESXi 7.0 U1, ESXi 7.0, ESXi 6.7 U3, ESXi 6.7 U2, ESXi 6.7 U1, ESXi 6.7, ESXi 6.5 U3, ESXi 6.5 U2, ESXi 6.5 U1, ESXi 6.5
• Microsoft Hyper-V: Windows Server 2022
• Citrix XenServer: XenServer 8, Citrix Hypervisor 8.2 LTSR CU1
• OpenStack: Cinder

Security

Firewall, encryption shared folder, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, HTTPS (customizable cipher suite)

General Specifications

• Supported Protocols: SMB1 CIFS, SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
• Supported Browsers: Chrome,Firefox,Edge,Safari
• 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, 한국
  어, 繁體中文, 简体中文

Notes

For an updated list of supported browser versions, check the Brand DSM Technical Specification

Packages and Applications

Synology AI Console

Centralize AI management with flexible configurations for AI model integration, user access control, data privacy, usage policies, and resource allocation

• Third-Party AI Model Integration: V

Synology Drive

Synchronizes files across Windows, macOS, Linux, Android and iOS. The built-in cross-platform portal allows access to data anytime and anywhere

• Maximum Number of Users: 20
• 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)

File Station

Provides virtual drives, remote folders, Windows ACL editor, compression/extraction of archived files, bandwidth control for specific users/groups, creation of sharing links, and transfer logs

Hybrid Share

Synchronize data across multiple sites for fast and efficient multi-site teamwork. Powered by Synology C2 Storage, Hybrid Share requires purchase of a monthly or annual subscription

SAN Manager

• Maximum iSCSI Target Number: 2
• Maximum LUN: 4
• LUN Clone/Snapshot, Windows ODX:  Yes

Virtual Machine Manager

• Recommended Virtual Machine Instances:  2
• Recommended Virtual DSM Number (Licenses required): 2 (including 1 Free License)

Hyper Backup

Supports local backup, network backup, and data backup to other servers and public clouds, including C2 Storage

Snapshot Replication

• Maximum Snapshots per Shared Folder: 128
• Maximum of System Snapshots: 1024

Synology High Availability

Reduces service downtime by combining two identical NAS into a high-availability cluster

Synology Chat

• Maximum Number of Users: 100

Synology Office

• Maximum Number of Users : 20

Synology MailPlus / MailPlus Server

A secure, reliable, and private mail solution featuring high-availability, load balancing, security, and filtering options

• Free Email Accounts: 5 (Additional accounts require purchase of licenses)
• Maximum Number of Users: 20

Surveillance Station

• Default Licenses: 2 (Additional cameras require purchase of licenses)

Suggested Maximum IP Cameras and Total FPS (H.264)

• 1080p: 40 channels, 800 FPS
• 3M: 35 channels, 350 FPS
• 5M: 28 channels, 280 FPS
• 4K: 17 channels, 170 FPS

Suggested Maximum IP Cameras and Total FPS (H.265)

• 1080p: 40 channels, 1200 FPS
• 3M 40 channels, 600 FPS
• 5M 40 channels, 480 FPS
• 4K 20 channels, 200 FPS

Central Management System

Provides a single interface to manage and monitor multiple Synology NAS

VPN Server

• Maximum Connections:  4

Warranty: 3-year hardware warranty

Note: Features, Price and Specifications are subject to change without notice. Images use for Representation Purpose Only.