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    Synology DiskStation DS418j Diskless 4 Bay NAS

    Manufacturer: Synology
    DiskStation DS418j Powerful entry-level 4-bay NAS for home data backup and multimedia streaming *Actual product may vary
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    Ideal Companion for Your Private Cloud


    DS418j is a 4-bay NAS server designed for home and personal users to effectively manage, protect and share data. Its new 64-bit dual-core processor supports over 40 TB raw single volume capacity for flexible data management.




    64-bit dual-core 1.4GHz




    Twice the RAM size, 1GB DDR4


    Fast Performance


    over 112 MB/s encrypted reading and 87 MB/s encrypted writing performance




    21.22 W in access and 8.97 W in HDD hibernation


    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.



    Centralized backup storage for your computers


    Back up any devices, whether it is a Windows computer, Mac, or other devices. Synology's comprehensive multi-version backup solution can protect your PC and NAS against malicious attacks including the rising encryption-based ransomware threats. Learn more




    Synology Hybrid RAID (SHR) technology


    Storage management is easy with Synology Hybrid RAID (SHR) technology. SHR is an automated RAID management system allowing you to easily create and expand storage volumes and migrate RAID types without requiring details on RAID. SHR provides 1 to 2-disk redundancy to safeguard your data during drive failures.





    SHR maximizes the data capacity of your RAID when different sizes of HDDs are used. Calculate your RAID needs.



    Easy Management


    For novice users who have no technical background and still want to protect their data using RAID technology, a convenient installation wizard will guide you through all the steps during your first installation.





    You can add new disks on the fly in Storage Manager with a simple click. Learn more about SHR.





    While creating a volume, you can plan ahead and leave empty and unallocated space for future usage.


    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.






    Powered by Synology DSM



    Surveillance Station


    Complete surveillance solution for recording, monitoring, and management.


    Learn more



    Desktop Backup


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


    Learn more



    File Server/Management


    Powerful built-in file management and sharing services.


    Learn more



    DSM UI


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


    Learn more





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


    Learn more





    Complete multimedia solution for management, streaming, and playback.


    Learn more



    1Status indicator
    2LAN indicator
    3Power button and indicator
    4Drive status indicator
    51GbE RJ-45 port


    6Power port
    7Kensington Security Slot
    9USB 3.0 port
    10Reset button


    Hardware Specifications
    CPU Model Realtek RTD1293
    CPU Architecture 64-bit
    CPU Frequency Dual Core 1.4 GHz
    Hardware Encryption Engine  
    System Memory 1 GB DDR4
    Drive Bays 4
    Compatible Drive Type* (See all supported drives)

    3.5" SATA HDD

    2.5" SATA HDD

    2.5" SATA SSD

    Maximum Internal Raw Capacity 48 TB (12 TB drive x 4) (Capacity may vary by RAID types)
    Maximum Single Volume Size 108 TB

    "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 single volume size is not directly related to the maximum raw capacity. (Learn more)

    External Ports
    RJ-45 1GbE LAN Port 1
    USB 3.0 Port 2
    File System
    Internal Drives EXT4
    External Drives







    Notes exFAT Access is purchased separately in Package Center.
    Size (Height x Width x Depth) 184 mm x 168 mm x 230 mm
    Weight 2.21 kg
    System Fan 80 mm x 80 mm x 2 pcs
    Fan Speed Mode

    Full-Speed Mode

    Cool Mode

    Quiet Mode

    Low-power Mode

    Brightness adjustable front LED indicators  
    Power Recovery  
    Noise Level* 20.6 dB(A)
    Scheduled Power On/Off  
    Wake on LAN/WAN  
    Power Supply Unit / Adapter 90W
    AC Input Power Voltage 100V to 240V AC
    Power Frequency 50/60 Hz, Single Phase
    Power Consumption* 21.22 W (Access)
    8.97 W (HDD Hibernation)
    British Thermal Unit 72.41 BTU/hr (Access)
    30.61 BTU/hr (HDD Hibernation)
    Environment Temperature
    Operating Temperature 5°C to 40°C (40°F to 104°F)
    Storage Temperature -20°C to 60°C (-5°F to 140°F)
    Relative Humidity 5% to 95% RH








    Notes Power consumption is measured when fully loaded with Western Digital 1TB WD10EFRX hard drive(s).
    DSM Specifications ( See more )
    Storage Management
    Maximum Internal Volume Number 256
    Maximum iSCSI Target Number 10
    Maximum iSCSI LUN 10
    SSD TRIM  
    Supported RAID Type

    Synology Hybrid RAID



    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

    Volume Expansion by Adding a HDD Synology Hybrid RAID
    RAID 5
    Global Hot Spare Supported RAID Type Synology Hybrid RAID
    RAID 1
    RAID 5
    File Sharing Capacity
    Maximum Local User Accounts 1024
    Maximum Local Groups 256
    Maximum Shared Folder 256
    Maximum Shared Folder Sync Tasks 2
    Maximum Concurrent CIFS/AFP/FTP Connections 100
    Windows Access Control List (ACL) Integration  
    NFS Kerberos Authentication  
    Log Center  
    Syslog Events per Second 100
    Add-on Packages (learn more about the complete add-on package list)
    Maximum Users 10
    Notes The 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 Devices 100
    Maximum Number of Synced Files (ext4) 100,000 / single file reaction time 789 ms
    Notes The 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 Tasks 30
    Maximum Number of Synced Files 100,000 / single file reaction time 941 ms
    Maximum Number of Concurrent Connections for PC Clients 200
    Notes The 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  
    Facial recognition  
    Subject recognition  
    Maximum Users 200
    Notes Multiple 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) 16 (including 2 Free License) (See All Supported IP Cameras)
    Total FPS (H.264)* 480 FPS @ 720p (1280x720)
    240 FPS @ 1080p (1920×1080)
    150 FPS @ 3M (2048x1536)
    100 FPS @ 5M (2591x1944)
    70 FPS @ 4K (3840x2160)
    Total FPS (H.265)* 480 FPS @ 720p (1280x720)
    320 FPS @ 1080p (1920×1080)
    224 FPS @ 3M (2048x1536)
    160 FPS @ 5M (2591x1944)
    100 FPS @ 4K (3840x2160)
    Total FPS (MJPEG)* 224 FPS @ 720p (1280x720)
    150 FPS @ 1080p (1920×1080)
    100 FPS @ 3M (2048x1536)
    60 FPS @ 5M (2591x1944)
    Notes Surveillance 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 Transcoding Group 2 (See more)
    VPN Server  
    Maximum Connections 5
    Environment & Packaging
    Environment RoHS Compliant
    Packaging Content Main 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
    Optional Accessories Surveillance Device License Pack
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