An all-in-one data management and sharing platform
- The 4-bay DS423+ is a capable performer with all the tools you need to secure, share, back up, and sync your data and media. Built-in solutions available in Synology DiskStation Manager (DSM) let users create their own private cloud, organize and stream music, video, and photo collections across all devices, seamlessly collaborate with partners, set up an intuitive surveillance system, and more

Access Your Data Anytime, Anywhere
- Securely and conveniently store any type of data with the aid of our comprehensive and intuitive access and management tools.
- Access from anywhere directly from your browser without configuring complex port forwarding rules, with Synology QuickConnect
- Browse and manage your files from any browser or through Windows File Explorer, Finder on Mac, and more.
- Keep your photos and videos organized using Synology Photos’ smart sorting functions
- Docker support provides access to a wide range of media management applications available as containers
- Easily incorporate into existing network infrastructure as edge storage thanks to Windows AD and LDAP support

Share, Sync, and Collaborate
- Whether sharing photos and videos with family or working on business projects with coworkers around the globe, Synology solutions make sharing, collaboration, and synchronization a breeze.
- Build a private data cloud for easy file management and sharing across all desktop and mobile devices, and keep data on your Synology systems in sync with Synology Drive
- Synchronize data from and to popular cloud storage platforms with Synology Cloud Sync
- Securely share photos and videos with family, friends, or business clients using Synology Photos
- Keep multiple sites in sync by leveraging the power of C2 cloud servers with Synology Hybrid Share.3 Reduce local storage and bandwidth usage by downloading files from the cloud only when needed

Flexible Data Protection Options
- Synology DSM comes with host of backup solutions for different scenarios available at no extra cost.
- Centrally set up and manage backups of Windows endpoints, Linux servers, VMware, Hyper-V, Microsoft 365, and Google Workspace with Active Backup Suite
- Leverage real-time and scheduled backups of your PC folders with Synology Drive to protect data against ransomware attacks or accidental deletion
- Safeguard photos and videos taken on mobile devices with automatic backups to Synology Drive or Synology Photos
- Efficiently back up your entire Synology NAS or select folders to a wide variety of destinations using Hyper Backup
- Store backups to C2 Storage,3 a dedicated and secure cloud destination powered by Synology C2
- Create point-in-time copies of shared folders that can be replicated to other Synology systems and rapidly restored with Snapshot Replication

Private Video Surveillance
- Synology Surveillance Station transforms any Synology system into a powerful network video recorder (NVR).
- 8,300+ 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 Surveillance for an extra layer of data protection and more convenient sharing

Features
- Centralized Data Storage
Store up to 72 TB of data1 in one place, maintain 100% data ownership, and enjoy multi-platform access
- Dependable Performance
Up to 226/224 MB/s sequential read/write throughput supports stable data transfers2
- Built-in Data Management Tools
Leverage built-in file and photo management, data protection, and surveillance solutions
- Effortless Data Sharing and Syncing
Access, share, and sync your data and media easily across different operating systems and devices

Specifications
- CPU: Intel Celeron J4125 4-core (4-thread) 2.0 GHz, burst up to 2.7 GHz
- Memory: 2 GB DDR4 SODIMM (expandable up to 6 GB)5
- Compatible drive types
* 4 x 3.5" or 2.5" SATA SSD/HDD (drives not included)
- Hot swappable drives: Yes
- External ports: 2 x USB 3.2 Gen 1 ports
- Form factor: Desktop
- LAN ports: 2 x 1GbE RJ-45
- Wake on LAN/WAN: Yes
- Scheduled power on/off: Yes
- System fans: 2 x (92 x 92 x 25 mm)
- AC input power voltage: 100 V to 240 V AC
- Power frequency: 50/60 Hz, single phase
- Networking protocols: SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, and VPN (PPTP, OpenVPN, L2TP)

- File systems
* Internal: Btrfs, ext4
* External: Btrfs, ext4, ext3, FAT32, NTFS, HFS+, exFAT
- Supported RAID types: Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10

- Storage management
* Max. single volume size: 108 TB
* Max. number of system snapshots: 65,5367
* Max. number of internal volumes: 64

- SSD cache:
* Read/write cache support
* M.2 NVMe and 2.5" SATA SSD support

- File sharing capabilities:
* Max. number of local user accounts: 2,048
* Max. number of local groups: 256
* Max. number of shared folders: 512
* Max. number of concurrent SMB/NFS/AFP/FTP connections: 500

- Operating environment
* Temperature: 0°C to 40°C (32°F to 104°F)
* Relative humidity: 8% to 80% RH
- Storage environment:
* Temperature: -20°C to 60°C (-5°F to 140°F)
* Relative humidity: 5% to 95% RH
- Maximum operating altitude:5,000 m (16,400 ft)
- Size (HxWxD): 166 x 199 x 223 mm
- Weight: 2.18 kg

- Privileges: WindowsAccess Control List (ACL) and application privileges
- Directory services: Connects with Windows AD/LDAP servers enabling domain users to login via SMB/NFS/AFP/FTP/File Station using their existing credentials
- Security: Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt support, and HTTPS (configurable cipher suite)
- Supported browsers: Google Chrome, Firefox, Microsoft Edge, Safari 13 and later, and Safari (iOS 13.0 and later) on iPad, Chrome (Android™ 11.0 and later) on tablet
- Interface languages: English, Deutsch, Français, Italiano, Espanol, Dansk, Norsk, Svensk, Nederlands, ???????, Polski, Magyar, Portugues do Brasil, Portugues Europeu, Türkçe, Český, ???????, ???, ???, ????, ????