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DiskStation
DS420+
High Performance NAS with
SSD Cache Acceleration
Capability
Synology DiskStation DS420+ is a network-
attached storage solution for smooth data
sharing, video streaming, and photo indexing.
Two built-in M.2 SSD slots and Synology SSD
Cache technology allow you to boost system
I/O and application performance.
Highlights
Accelerated Application Performance
•
Average 15% performance boost to photo indexing
and other computing-intensive operations, as well as
database response time
Reach Optimal Performance and Capacity with SSD
•
Cache
Built-in M.2 2280 NVMe SSD slots permit cache
acceleration without occupying storage drive bays
Eortless Data Sharing & Synchronization
•
Access, share, and sync your data easily across dierent
operating systems and devices
Protect and Restore Data in a Snap
•
Back up critical data and reduce your Recovery Time
Objective (RTO) with Snapshot Replication
Entertaining Multimedia Hub
•
Organize and stream music, video, and photo
collections across all your devices
Anytime, Anywhere
•
Freely access les on the go and back up mobile photos
with iOS and Android™ apps
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Streamline Your Data Management Experience
DS420+ is a powerful 4-bay desktop NAS that brings you a fast and
smooth data management experience, as well as over 226 MB/s
sequential read and 225 MB/s sequential write1 throughput. It
benets computing-intensive applications, speeding up Synology Drive
and Moments2 by an average 15%, and boosting Web PHP response
eciency by about 95% compared to its predecessor, for simple and
ecient data management.
DS420+ comes with two built-in M.2 SSD slots that support Synology
SSD Cache technology, allowing you to reduce random I/O response
time 20 times compared with spinning drives without occupying front
drive bays.
Establish a Strong Storage Foundation with Btrfs
DS420+ features a Btrfs le system optimized by Synology to oer you
high reliability and high performance. Btrfs supports advanced storage
technologies that meet the needs of modern business:
Next-Generation File System
Btrfs is a modern le system designed to
safeguard data integrity through metadata
mirroring, le self-healing, and fast snapshot
replication.
• Advanced snapshot technology provides schedulable and
near-instantaneous data protection of shared folders and LUNs.
• File and folder level data restoration oers users who wish to
restore only a specic le or folder more exibility.
• Flexible Shared Folders and User Quota System provide
comprehensive quota control on all user accounts and shared folders.
• File self-healing allows Btrfs le systems to auto-detect corrupted
les using mirrored metadata and to recover broken data using RAID
congurations.
• Inline compression compresses data before writing them to the drive,
to optimize storage use and reduce write commands to the drives.
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Synology Backup Suite
A centralized, integrated, and license-free backup
solution to protect every bit of your data.
Multimedia Streaming
Seamlessly gather and stream music, video, and
photo collections across all your devices.
Powerful Backup Tools
DS420+ oers users a range of backup solutions for cloud and physical, onpremises environments. Backing up and restoring data is eortless – and
completely free of licenses on compatible NAS models.
• Back up your cloud data: Cloud Sync enables users to seamlessly back
up or synchronize data between a local Synology NAS and other cloud
services.
• Back up your PCs and servers: Synology Drive Client backs up your
Windows®, Mac®, and Linux® desktop devices to safeguard important
computer les.
• Back up your Synology NAS: Hyper Backup oers a wide range of
destinations for backups of your NAS, including on-premises and cloud.
Your Personal Multimedia Library
DS420+ helps you easily manage multimedia content and share it across
Windows®, macOS®, and Linux® platforms.
• Video Station helps you organize your personal digital video library using
dierent data and criteria. Streaming videos to Apple TV, Android TV,
Samsung TV, Chromecast and mobile apps is a breeze, and a wide range
of digital devices are supported.
• Audio Station provides music playback via AirPlay® devices, and
comes with lossless audio format support and Internet radio. Using the
Alexa Audio Station feature, you can call out your music to your Voice
Assistant.
• Moments' and Photo Station's intuitive design t both home users and
professional photographers. Auto-created albums help you manage your
images in seconds. You can also share photographs with local users or
the public while regulating security using ne permission settings.
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Low Power Consumption
DS420+ is designed with energy-eciency in mind,
helping you minimize your carbon footprint.
Multimedia Anytime, Everywhere
Synology's mobile apps let you enjoy your multimedia library anytime,
anywhere. Available on iOS and Android™ platforms, DS photo, DS
audio, DS video, and DS le let you access your Synology NAS through
Photo Station, Audio Station, Video Station, and File Station,
respectively. With Synology QuickConnect, you can connect to your
Synology NAS using a secure and customizable address for instant access
to media and work les on Windows®, Mac®, Linux®, and mobile devices.
Cool & Quiet Design for Energy Eciency
Synology DS420+ is designed with energy eciency in mind. Compared
with its average PC counterpart, Synology DS420+ consumes less
power, at 28.30 watts while accessing and 8.45 watts when hard drive
hibernation is enabled. The power scheduling feature further reduces
power consumption and operating cost.
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Front
Rear
Hardware Overview
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2
3
4
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11
10
874
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1 Status indicator 2 Drive status indicator 3 Drive tray lock 4 USB 3.0 port
5 Power button and indicator 6 Drive tray 7 1GbE RJ-45 port 8 Reset button
9 Power port 10 System fan 11 Kensington Security Slot
Technical Specications
Hardware
CPU Intel Celeron J4025 2-core 2.0 GHz, burst up to 2.9 GHz
Hardware encryption engine Yes (AES-NI)
Memory 2 GB DDR4 onboard (expandable up to 6 GB)
Compatible drive type
Hot swappable drive Yes
External port 2 x USB 3.0 port
Size (HxWxD) 166 x 199 x 223 mm
Weight 2.18 kg
LAN 2 x Gigabit (RJ-45)
Wake on LAN/WAN Yes
Scheduled power on/o Yes
System fan 2 (92 x 92 x 25 mm)
AC input power voltage 100 V to 240 V AC
Power frequency 50/60 Hz, single phase
Operating temperature 0°C to 40°C (32°F to 104°F)
Storage 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)
• 4 x 3.5" or 2.5" SATA HDD/SSD (drives not included)
• 2 x M.2 2280 NVMe SSD (drives not included)
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General DSM specication
English, Deutsch, Français, Italiano, Español, Dansk, Norsk, Svensk, Nederlands, Русский, Polski, Magyar,
Português do Brasil, Português Europeu, Türkçe, Český,
Networking protocol SMB, AFP, NFS, FTP, WebDAV, CalDAV, iSCSI, Telnet, SSH, SNMP, VPN (PPTP, OpenVPN™, L2TP)
File system
Supported RAID type Synology Hybrid RAID (SHR), Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
Storage management
SSD cache
File sharing capability
Privilege Windows® Access Control List (ACL), application privilege
Directory service Windows® AD integration: Domain users login via SMB/NFS/AFP/FTP/File Station, LDAP integration
Virtualization VMware vSphere® 6.5, Microsoft Hyper-V® , Citrix®, OpenStack
Security
Supported client Windows® 7 onwards, macOS® 10.12 onwards
Supported browser
Interface Language
• Internal: Btrfs, ext4
• External: Btrfs, ext4, ext3, FAT, NTFS, HFS+, exFAT
• Maximum single volume size: 108 TB
• Maximum system snapshots: 65,536
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4
• Maximum internal volume: 64
• Read/write cache support
• M.2 NVMe SSD support
• Maximum local user account: 2,048
• Maximum local group: 256
• Maximum shared folder: 512
• Maximum concurrent SMB/NFS/AFP/FTP connection: 500
®
Firewall, shared folder encryption, SMB encryption, FTP over SSL/TLS, SFTP, rsync over SSH, login auto block, Let's Encrypt
support, HTTPS (customizable cipher suite)
Chrome®, Firefox®, Edge®, Internet Explorer® 10 onwards, Safari® 10 onwards; Safari (iOS 10 onwards), Chrome (Android™ 6.0
onwards) on tablets
Packages and Applications
File Server & Synchronization
Provide a universal portal to synchronize your les across various platforms, including Windows®, macOS®, Linux®, AndroidTM
Synology Drive
File Station
FTP Server
Presto File Server
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Cloud Sync
Universal Search Oer global search into applications and les
iSCSI Storage & Virtualization
iSCSI Manager
Virtual Machine Manager Deploy and run various virtual machines on Synology NAS, including Windows®, Linux®, or Virtual DSM
Data Protection & Backup Solution
Hyper Backup Support local backup, network backup, and backup data to public clouds
Backup tools
Snapshot Replication
Synology High Availability Reduce service downtime by setting up two identical NAS into one high-availability cluster
Active Backup for G Suite Support G Suite My Drive and Team Drive backup and restoration
Active Backup for Oce 365 Support Oce 365 OneDrive for Business, mail, contacts, and calendar backup and restoration
and iOS. The built-in universal portal allows you to access data anytime and anywhere.
• Maximum number of hosted files: 500,000
• Maximum number of concurrent connections for PC clients: 350
Virtual drive, remote folder, Windows® ACL editor, compressing/extracting archived les, bandwidth control for specic users
or groups, creating sharing links, transfer logs
Bandwidth control for TCP connections, custom FTP passive port range, anonymous FTP, FTP SSL/TLS and SFTP protocol,
boot over the network with TFTP and PXE support, transfer logs
High-speed data transfer over WAN with exclusive SITA technology between Synology NAS and desktop
One or two-way synchronization with public cloud storage providers including Alibaba Cloud OSS, Amazon Drive, Amazon
S3-compatible storage, Backblaze B2, Baidu Cloud, Box, Dropbox, Google Cloud Storage, Google Drive, hubiC, MegaDisk,
Microsoft OneDrive, OpenStack Swift-compatible storage, Tencent COS, WebDAV servers, Yandex Disk
• Maximum iSCSI target: 128
• Maximum iSCSI LUN: 256
• iSCSI LUN clone/snapshot support
DSM conguration backup, macOS® Time Machine support, Synology Drive Client desktop application
Shared folder sync - maximum task number: 8
• Maximum of shared folder snapshots: 1,024
• Maximum of replication: 32
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Active Backup for Business
All-in-one backup solution designed for heterogeneous business IT environment, enabling IT admins to remotely manage
and monitor protection over PC, servers and VM on one centralized console
Productivity & Collaboration
Collaborate with instant message service Synology Chat, online editor Synology Oce, and scheduling assistant Synology
Collaboration tools
Note Station Rich-text note organization and versioning, encryption, sharing, media embedding and attachments
Synology MailPlus Server
Synology MailPlus Intuitive webmail interface for Synology MailPlus Server, customizable mail labels, lters, and user interface
Calendar
• Chat maximum users: 600
• Office maximum users: 1,000
• Calendar: support CalDAV and access via mobile devices
Secure, reliable, and private mail solution with high-availability, load balancing, security and ltering design (Includes 5 free
email account licenses; additional accounts require the purchasing of additional licenses)
Multimedia
Moments
Other packages Video Station, Photo Station, Audio Station, iTunes® Server
Support smart AI album with facial and subject recognition, photo editing and sharing features, similar photo detection, autoediting functions such as color correction and angle adjustments, and AI selection of the best photos. Mobile applications are
available on iOS and AndroidTM devices
Surveillance
Surveillance Station
Maximum IP camera: 25 (total of 750 FPS at 720p, H.264) (Including two free camera licenses; additional cameras require the
purchasing of additional licenses)
All-in-One Server
Synology Directory Server Provide a exible and cost-eective domain controller solution
Central Management System Provide a single interface to manage and monitor multiple Synology NAS
VPN Server Maximum connection: 30. Supported VPN protocol: PPTP, OpenVPN™, L2TP/IPSec
Mail Server Supported Mail Server protocols: POP3, SMTP, IMAP, LDAP/AD account support
Mail Station Webmail interface for Mail Server to receive emails from multiple POP3 mailboxes, customizable SMTP server
Web Station Virtual host (up to 30 websites), PHP/MariaDB®, third-party applications support
Other packages DNS Server, RADIUS Server, Log Center
Others
Storage Analyzer
Antivirus Essential Full system scan, scheduled scan, white list customization, virus denition auto update
iOS/Android™ applications
Other packages Additional 3rd-party packages available on Package Center
Volume and quota usage, total size of les, volume usage and trends based on past usage, size of shared folders, large les,
most recently modied les, least recently accessed les
Synology Drive, Synology MailPlus, Synology Chat, Synology LiveCam, Moments, DS audio, DS photo, DS video, DS cam,
DS le, DS nder, DS note
Environment and Packaging
Environment safety RoHS compliant
• DS420+ main unit x 1
• Quick Installation Guide x 1
Package content
Optional accessories
Warranty 3 years
*Model specications are subject to change without notice. Please refer to www.synology.com for the latest information.
1. Performance gures may vary depending on environment, usage, and conguration.
2. Performance gures are based on the average percentage improvement of DS420+ relative to its predecessor, as tested at Synology labs. Test items include le
indexing in Synology Drive and photo indexing in Moments.
3. DS420+ comes with 2 GB DDR4 onboard and can support up to 6 GB by adding one optional DDR4 non-ECC 4 GB SO-DIMM.
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• Accessory pack x 1
• AC power adapter x 1
• AC power cord x 1
• RJ-45 LAN cable x 2
• DDR4 non-ECC SO-DIMM 4 GB (D4NESO-2666-4G)
• VisualStation VS360HD, VS960HD
• Surveillance Device License Pack
• Synology MailPlus License Pack
• Virtual DSM License Pack
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4. exFAT Access can be purchased separately in Package Center.
5. System snapshots include snapshots taken by iSCSI Manager, Snapshot Replication, and Virtual Machine Manager. Availability of these packages varies by
model.
6. Presto File Server licenses can be purchased separately in Package Center.
7. Please refer to www.synology.com/compatibility for the latest optional accessories list.
8. 5-year warranty is available as an optional bundle with EW201, a 2-year Extended Warranty service add-on. Visit https://www.synology.com/en-global/products/
Extended_Warranty for more information on availability. The warranty period starts from the purchase date as stated on your receipt of purchase. Visit https://
www.synology.com/company/legal/warranty for more information.
SYNOLOGY INC.
Copyright © 2020, Synology Inc. All rights reserved. Synology, the Synology logo are trademarks or registered trademarks of Synology Inc. Other product and
company names mentioned herein may be trademarks of their respective companies. Synology may make changes to specication and product descriptions at
anytime, without notice.
DS420+-2020-ENU-REV001
DATASHEET | DiskStation DS420+
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