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Synology DS420j
CPU: Realtek RTD1296 Quad Core 1.4 GHz
System Memory: 1 GB DDR4
Internal HDD: 3.5" or 2.5" SATA(II) x4
Max Internal Capacity: 64TB (4x 16TB hard drives)
External Ports: USB 3.0 port x2
LAN: Gigabit x1
Max Supported IP Camera: 16 (including 2 Free License)


An essential entry-level NAS for your home

BUILD A PRIVATE CLOUD FOR YOUR HOME
- DS420j is a 4-bay desktop NAS designed for home data backup, file syncing, and sharing
- Supporting up to 64 TB raw capacity, you can easily centralize all your multimedia collections
* CPU: 64-bit 4-core 1.4 GHz
* Performance: Over 112 MB/s encrypted reading and writing
* Storage: Maximum 64 TB raw capacity
* Energy-saving: 7.88 W in hibernation mode

MANAGE YOUR PHOTO COLLECTIONS
- Smartly organize your photos with Synology Moments, a modern, AI-enabled photo management application that allows you to preserve your precious memories effortlessly

STREAM CONTENT TO YOUR TV
- Turn your Synology NAS into a home media hub and stream your digital contents to your favorite devices such as computers, mobile devices, Samsung TV, Apple TV, Google Chromecast, and DLNA devices

SEAMLESS INTEGRATION WITH YOUR MOBILE DEVICES
- Synology mobile applications are designed to allow quick and secure access to your data wherever you are

CROSS-PLATFORM FILE SYNCING AND SHARING
- Synology Drive allows you to sync files across Windows, macOS, Linux, and mobile devices, keeping everything up-to-date
* Sync files on demand: Save the storage space and network bandwidth of your PC
* Go back in time: Easily retrieve previous versions of your shared files
* Back up your data: Protect your files as scheduled or in real-time

RELIABLE AND EFFICIENT BACKUP OPTIONS
- Synology Hyper Backup is a reliable and multi-directional backup solution offering data deduplication and compression
- You can back up from various source folders, including external USB drives, another Synology NAS, rsync servers, or from public cloud services like Google Drive or Synology C2, and protect your data against malicious attacks and encryption-based ransomware threats

POWERED BY SYNOLOGY DSM
- Multimedia: Complete multimedia solution for management, streaming, and playback
- Desktop Backup: Simplified backup solution for your Mac, PC, and mobile devices
- File Server/Management: Powerful built-in file management and sharing services
- Synology Drive: A versatile solution for file management and synchronization
- Hyper Backup: Store multiple backup versions with block-level incremental data backup and cross-version deduplication
- Surveillance Station: Complete surveillance solution for recording, monitoring, and management

Hardware Specifications
CPU
- CPU Model: Realtek RTD1296
- CPU Architecture: 64-bit
- CPU Frequency: Quad Core 1.4 GHz
- Hardware Encryption Engine: Yes

MEMORY
- System Memory: 1 GB DDR4
* Synology reserves the right to replace memory modules with the same or higher frequency based on supplier's product life cycle status. Rest assured that the compatibility and stability have been strictly verified with the same benchmark to ensure identical performance.

STORAGE
- Drive Bays: 4
- Compatible Drive Type:
* 3.5" SATA HDD
* 2.5" SATA HDD
* 2.5" SATA SSD
- Maximum Internal Raw Capacity: 64 TB (16 TB drive x 4) (Capacity may vary by RAID types)
- Maximum Single Volume Size: 108 TB

EXTERNAL PORTS
- RJ-45 1GbE LAN Port: 1
- USB 3.0 Port: 2

FILE SYSTEM
- Internal Drives: EXT4
- External Drives: EXT4, EXT3, FAT, NTFS, HFS+, exFAT
* exFAT Access is purchased separately in Package Center

APPEARANCE
- Size (H×W×D): 184×168×230 mm
- Weight: 2.21 kg

OTHERS
- System Fan: 80×80 mm ×2 pcs
- Fan Speed Mode: Full-Speed Mode, Cool Mode, Quiet Mode, Low-power Mode
- Brightness Adjustable Front LED Indicators: Yes
- Power Recovery: Yes
- Noise Level: 20.6 dB(A)
- Scheduled Power On / Off: Yes
- Wake on LAN / WAN: Yes
- Power Supply Unit / Adapter: 90 W
- AC Input Power Voltage: 100 V to 240 V AC
- Power Frequency: 50/60 Hz, Single Phase
- Power Consumption: 21.71 W (Access), 7.88 W (HDD Hibernation)
- British Thermal Unit: 74.08 BTU/hr (Access), 26.89 BTU/hr (HDD Hibernation)

TEMPERATURE
- Operating Temperature: 0C to 40C (32F to 104F)
- Storage Temperature: -20C to 60C (-5F to 140F)
- Relative Humidity: 5% to 95% RH

CERTIFICATION
- FCC, CE, EAC, BSMI, VCCI, CCC, RCM

ENVIRONMENT
- RoHS Compliant

PACKAGING CONTENT
- 1× Main Unit
- 1× Accessory Pack
- 1× AC Power Adapter
- 1× AC Power Cord
- 1× RJ-45 LAN Cable
- Quick Installation Guide

OPTIONAL ACCESSORIES
- Surveillance Device License Pack
- VS360HD
- VS960HD

Software Specifications
STORAGE MANAGEMENT
- Maximum Internal Volume Number: 64
- Maximum iSCSI Target Number: 10
- Maximum iSCSI LUN: 10
- SSD TRIM: Yes
- Supported RAID Type: Synology Hybrid RAID, Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
- RAID Migration: Basic to RAID 1, Basic to RAID 5, RAID 1 to RAID 5, RAID 5 to RAID 6
- Volume Expansion with Larger HDDs: Synology Hybrid RAID, RAID 1, RAID 5, RAID 6, RAID 10
- Volume Expansion by Adding a HDD: Synology Hybrid RAID, JBOD, RAID 5
- Global Hot Spare Supported RAID Type: Synology Hybrid RAID, RAID 1, RAID 5

FILE SERVICES
- File Protocol: CIFS/AFP/NFS/FTP/WebDAV
- Maximum Concurrent CIFS/AFP/FTP Connections: 100
- Windows Access Control List (ACL) Integration: Yesy
- NFS Kerberos Authentication: Yes

ACCOUNT & SHARED FOLDER
- Maximum Local User Accounts: 1.024
- Maximum Local Groups: 256
- Maximum Shared Folder: 256
- Maximum Shared Folder Sync Tasks: 4

LOG CENTER
- Syslog Events per Second: 100

GENRAL SPECIFICATIONS
- Networking Protocols: SMB1 (CIFS), SMB2, SMB3, NFSv3, NFSv4, NFSv4.1, NFS Kerberized sessions, iSCSI, HTTP, HTTPs, FTP, SNMP, LDAP, CalDAV
- Supported Browsers:
* Chrome
* Firefox
* Edge
* Internet Explorer 10 onwards
* Safari 10 onwards
* Safari (iOS 10 onwards)
* Chrome (Android 6.0 onwards)

SYNOLOGY CHAT
- Maximum Users: 10

DOWNLOAD STATION
- Maximum Concurrent Download Tasks: 80

MEDIA SERVER
- DLNA Compliance: Yes

MOMENTS
- Facial Recognition: Yes
- Subject Recognition: Yes

SURVEILLANCE STATION
- Maximum IP cam (Licenses required): 16 (including 2 Free License)
- Total FPS (H.264):
* 480 FPS @ 720p (1280×720)
* 288 FPS @ 1080p (1920×1080)
* 150 FPS @ 3M (2048×1536)
* 100 FPS @ 5M (2591×1944)
* 70 FPS @ 4K (3840×2160)
- Total FPS (H.265):
* 480 FPS @ 720p (1280×720)
* 384 FPS @ 1080p (1920×1080)
* 256 FPS @ 3M (2048×1536)
* 160 FPS @ 5M (2591×1944)
* 100 FPS @ 4K (3840×2160)
- Total FPS (MJPEG):
* 240 FPS @ 720p (1280×720)
* 150 FPS @ 1080p (1920×1080)
* 100 FPS @ 3M (2048×1536)
* 60 FPS @ 5M (2591×1944)

SYNOLOGY DRIVE
- Recommended Number of Hosted Files: 100.000 (applies to files indexed or hosted by Synology Drive. For file access through other standard protocols, refer to the File Services section above)
- Recommended Number of Concurrent Sync Clients: 200 (the number of connections that can be maintained when the recommended number of hosted files was reached)

SYNOLOGY OFFICE
- Maximum Users: 200

VIDEO STATION
-Video Transcoding: Group 2

VPN SERVER
- Maximum Connections: 10