DS218J

DiskStation DS218J

A versatile entry-level 2-bay NAS for home and personal cloud storage

Cost-effective home storage server

Backup all your digital assets with Synology DS218j, a powerful 2-bay NAS with rapid data transmission and low power consumption, designed for home users.

Fast Performance
Over 113 MB/s and 112 MB/s sequential reading and writing

Eco-friendly
17.48 W in access, 7.03 W in HDD Hibernation

Cloud Station Backup for PC protection

Featuring real-time incremental backup technology, your data stored on a PC can be backed up to a Synology NAS instantly, using minimal system resources, bringing a truly comprehensive and secure private cloud experience.

Incremental backup: fast while reducing performance impact

Cloud Station provides an optimized PC backup solution. With the incremental backup technology, Cloud Station backs up only the modified files and divides them into even smaller parts, demanding significantly less system resources than traditional backup methods.

Real-time backup saving you from massive data loss

Cloud Station Backup carries out the most complete backup tasks in real-time. When data is voluminous, real-time backup prevents massive data loss due to unexpected disaster during backup cycles.

Synchronize files across your devices

Cloud Station Suite provides real-time data synchronization across all your devices and other Synology NAS. “Intelliversioning" keeps the most important file versions to better utilize storage space.

Easy file access with QuickConnect

Access files on your Synology NAS over the Internet without the hassle of setting up port forwarding rules, DDNS, or other complicated network settings. QuickConnect allows you to connect via a secure, customizable address, so that you can instantly access media and work files on any Internet-connected device with no additional charge.

Seamless integration with your mobile devices

Synology mobile applications are designed to allow quick and secure access to your data wherever you are.

DS Audio

DS Photo

DS video

Surveillance Station

Complete surveillance solution for recording, monitoring, and management.

Desktop Backup

Simplified backup solution for your Mac, PC, and mobile devices.

File Server/Management

Powerful built-in file management and sharing services.

DSM UI

Award-winning operating system with an intuitive user interface and powerful capabilities.

Security

Comprehensive built-in security tools are constantly updated to tackle evolving threats and protect your devices

Multimedia

Complete multimedia solution for management, streaming, and playback

Hardware Specifications 
CPU
CPU ModelMarvell Armada 385 88F6820
CPU Architecture32-bit
CPU FrequencyDual Core 1.3 GHz
Hardware Encryption Engine
Memory
System Memory512 MB DDR3
Storage
Drive Bays2
Compatible Drive Type* (See all supported drives)3.5″ SATA HDD
2.5″ SATA HDD (with optional 2.5″ Disk Holder)
2.5″ SATA SSD (with optional 2.5″ Disk Holder)
Maximum Internal Raw Capacity24 TB (12 TB drive x 2) (Capacity may vary by RAID types)
Maximum Single Volume Size16 TB
Notes“Compatible drive type” indicates the drives that have been tested to be compatible with Synology products. This term does not indicate the maximum connection speed of each drive bay.
The maximum raw capacity is not limited by the maximum single volume size. Synology NAS models may utilize capacities over the maximum single volume size as long as each volume created is below the limit. (Learn more)
External Ports
RJ-45 1GbE LAN Port1
USB 3.0 Port2
File System
Internal DrivesEXT4
External DrivesEXT4
EXT3
FAT
NTFS
HFS+*
exFAT*
NotesHFS+ is read only, max 2TB volume size.
exFAT Access is purchased separately in Package Center.
Appearance
Size (Height x Width x Depth)165 mm x 100 mm x 225.5 mm
Weight0.88 kg
Others
System Fan92 mm x 92 mm x 1 pcs
Fan Speed ModeFull-Speed Mode
Cool Mode
Quiet Mode
Low-power Mode
Brightness adjustable front LED indicators
Power Recovery
Noise Level*18.2 dB(A)
Scheduled Power On/Off
Wake on LAN/WAN
Power Supply Unit / Adapter60W
AC Input Power Voltage100V to 240V AC
Power Frequency50/60 Hz, Single Phase
Power Consumption*17.48 W (Access)
7.03 W (HDD Hibernation)
British Thermal Unit59.68 BTU/hr (Access)
24 BTU/hr (HDD Hibernation)
Environment Temperature
Operating Temperature5°C to 40°C (40°F to 104°F)
Storage Temperature-20°C to 60°C (-5°F to 140°F)
Relative Humidity5% to 95% RH
CertificationEAC
CCC
RCM
KC
FCC
CE
BSMI
Warranty2 Years
NotesPower consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
Noise Level Testing Environment: Fully loaded with Seagate 2TB ST2000VN000 hard drive(s) in idle; Two G.R.A.S. Type 40AE microphones, each set up at 1 meter away from the Synology NAS front and rear; Background noise: 16.49-17.51 dB(A); Temperature: 24.25-25.75˚C; Humidity: 58.2-61.8%
DSM Specifications ( See more )
Storage Management
Maximum Internal Volume Number256
Maximum iSCSI Target Number10
Maximum iSCSI LUN10
Supported RAID TypeSynology Hybrid RAID
Basic
JBOD
RAID 0
RAID 1
RAID MigrationBasic to RAID 1
Volume Expansion with Larger HDDsSynology Hybrid RAID
RAID 1
Volume Expansion by Adding a HDDSynology Hybrid RAID
File Sharing Capacity
Maximum Local User Accounts1024
Maximum Local Groups256
Maximum Shared Folder256
Maximum Shared Folder Sync Tasks2
Maximum Concurrent CIFS/AFP/FTP Connections100
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Log Center
Syslog Events per Second100
Add-on Packages (learn more about the complete add-on package list)
Chat
Maximum Users10
NotesThe number of concurrent HTTP connections for Chat was configured to the maximum.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
Cloud Station Server
Maximum Number of Concurrently Connected Devices100
Maximum Number of Synced Files (ext4)100,000 / single file reaction time 840 ms
NotesThe maximum number of concurrently connected devices refers to the maximum number of devices that can remain connected at the same time. For more information on file processing capability, please refer to the reaction time for file processing.
File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS. RAM expansion was not used during testing.
Non-encrypted shared folders were used during the aforementioned testing.
Download Station
Maximum Concurrent Download Tasks30
Drive
Maximum Number of Synced Files100,000 / single file reaction time 941 ms
Maximum Number of Concurrent Connections for PC Clients200
NotesThe EXT4 file system was used for the purpose of testing.
The maximum number of concurrent connections refers to the maximum number of connections that could be maintained when the maximum number of synced files was reached.
File reaction time refers to the preparation time required for other devices to start downloading a 10KByte file from a Synology NAS after the file has been added to the NAS.
Non-encrypted shared folders were used during the aforementioned testing.
exFAT Access (optional)
Media Server
DLNA Compliance
Moments
Facial recognition
Subject recognition
Office
Maximum Users200
NotesMultiple files were opened for testing and each file was edited by 30 users simultaneously.
CPU and RAM usage were both under 80% when the number of maximum users was reached.
Client performance may affect maximum simultaneous editing users. Client PCs used for testing: Intel Core i3-3220 / 8GB RAM
Surveillance Station
Maximum IP cam (Licenses required)14 (including 2 Free License) (See All Supported IP Cameras)
Total FPS (H.264)*420 FPS @ 720p (1280×720)
120 FPS @ 1080p (1920×1080)
90 FPS @ 3M (2048×1536)
60 FPS @ 5M (2591×1944)
20 FPS @ 4K (3840×2160)
Total FPS (H.265)*420 FPS @ 720p (1280×720)
210 FPS @ 1080p (1920×1080)
140 FPS @ 3M (2048×1536)
90 FPS @ 5M (2591×1944)
30 FPS @ 4K (3840×2160)
Total FPS (MJPEG)*140 FPS @ 720p (1280×720)
70 FPS @ 1080p (1920×1080)
40 FPS @ 3M (2048×1536)
20 FPS @ 5M (2591×1944)
NotesSurveillance Station throughput is tested with Axis network camera, using continuous recording with live view from Surveillance Station and motion detection by camera. Live view and recording are sharing the same stream from the camera.
Video Station
Video TranscodingGroup 2 (See more)
VPN Server
Maximum Connections5
Environment & Packaging
EnvironmentRoHS Compliant
Packaging ContentMain Unit X 1
Accessory Pack X 1
AC Power Adapter X 1
AC Power Cord X 1
RJ-45 LAN Cable X 1
Quick Installation Guide X 1