Overview
Compare
Specs
Protection
Q&A

Questions & Answers

Shopper : Why Did You Choose This?MATTHEW S : This has been on my short list for awhile. I've been waiting for a good sale.PAUL S : Have an older version that I need to upgradeYUK C : i chose this because there are a lot of good reviews on YouTube.LEAN Q : On SaleTHAI D : Try nas first timeWILLIAM E : reviewsCHRISTOPHER D : SaleWINSTON M : deal of the dayIAN M : Efficient, well rated, excellent value.ANTHONY W : Best combo of speed, features, and price.ANIL P : for backupJOHN D : recommended by tech for photography company backup.RICHARD K : ValueYUBIN Y : For photo/videos backupSAM S : file sharing and backupZhicheng H : cheapJUAN M : performance vs valueBOB L : On sale. x86 and can stream 4K with Plex PassVARUN A : Good price!FELIX L : It was on a dealMICHAEL B : Solid NAS for the moneyAndrei M : Very good price!

Reviews about this item

Review Summary

2021-02-21T07:17:06

Rated 5 out of 5

Great personal use NAS

Replaced a 7yr old Qnap with this and love it! Obviously much faster than my old one, and this one supports Plex. Was able to get that setup and stream movies and music. Does everything I was hoping it would do.

SEAN R.

2021-01-24T05:45:51

Rated 5 out of 5

Great home NAS

Great price and performance from this home NAS. Bought the 2GB version and upgrade it to 8GB on my own. Easy to work on an since I already had an old Qnap NAS the interface is very similar with some improvements.

PAUL S.

2021-01-03T08:54:30

Rated 5 out of 5

it works great and seamless with Windows 10 also Plex is a Killer app with this NAS

great affordable NAS, it's working flawless with two old 4TB Toshiba NAS HDD, cheap memory upgrade I added a four GB stick of Crucial Notebook DDR4-2400 to a total of six GB that's a plus in my book, having said that it's still a learning curve for me as I'm not an advance user however I'm keeping this one

WINSTON M.

2021-01-03T08:34:33

Rated 5 out of 5

So far so good

No issues thus far on my new NAS system. The set up was easy and the product looks like it has a great build quality. Will update this review once I swap out the RAM eventually.

DICKSON C.

2020-12-18T17:30:00

Rated 3 out of 5

Mediocre, upgrade to TS-253D if you can

Dual-Core Celeron Processor, 2GB DDR4 2666GHz RAM, and 1 Ethernet port screams mediocrity for $250 that I paid for this. I recommend to upgrade to a TS-253D, which has a quad core processor, 4GB DDR4 and 2 Ethernet ports. You can buy additional 16GB of RAM for $40, making a big improvement in performance. Otherwise, this drags with Plex and QuMagie.

NEIL P.

2020-12-18T13:03:54

Rated 5 out of 5

Runs like a charm

NAS is not for everyone but for those who do need it, there are only 2 companies that are at the top of the list and QNAP is one of them. All NAS products have some nuances but the reason I went with this model is because I had been using a QNAP product for last 8 years and never had any problems, this model has same compute, and is flexible in terms of expanding memory, adding other pcie devices, connect through hdmi directly, etc as compared to the other NAS in the same category. Overall I am happy with the purchase.

MINHAS M.

2020-12-17T07:45:53

Rated 5 out of 5

Best for price

Easy to connect, friendly interface, ram ddr4 up to 32GB, small and powerful box.

Andrei M.

2020-12-13T19:33:51

Rated 5 out of 5

Powerful little NAS that can do it all

This is a awesome multi purpose NAS that has a PCIE slot. I'm currently using it as a NAS, multimedia player and download manager. At first I was kind of skeptical if it can run 4k HEVC 10 bit files but it had no issues at all. I have upgraded my NAS to 8GB of memory but there others that have reported 16GB works as well. I also added a 2.5 gigabit NIC. May be useful when running multiple VMs in the NAS. Highly recommend.

KYAN M.

2020-12-09T19:48:35

Rated 5 out of 5

First Step Into NAS

This is my first step into NAS. I mainly got this so I can sync and share photos. I can then cancel my Dropbox paid account and save money in the long run. So far I am enjoying the NAS and I am sure I will learn more as I own it longer given that this is my first NAS ever. I currently have 2 x 4TB hard drives set up in a RAID 1 configuration.

JAMES O.

Select a plan in the Add Protection section above and purchase with this product by clicking “Add to Cart”.

image-protection

TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

Invest In Your Gear and Peace Of Mind!

Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Failure Protection

Failure Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

We will never charge you a deductible after the purchase of a plan.

Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for international or U.S. territories purchases. Plans on open box items do not cover pre-existing damage.
Adorama Protect plans are available for ABS clients. If you have any questions or require assistanse, please call 800-223-2500

QNAP TS-251D Specifications

Hardware

Hardware

Jump to...
  • CPU

    Intel Celeron J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz)

  • CPU Architecture

    64-bit x86

  • Graphic Processors

    Intel HD Graphics 600

  • Floating Point Unit

    Yes

  • Encryption Engine

    Yes (AES-NI)

  • Hardware-accelerated Transcoding

    Yes

  • System Memory

    2 GB SO-DIMM DDR4 (1x 2 GB)

  • Maximum Memory

    8 GB (2x 4GB)

  • Memory Slot

    2x SO-DIMM DDR4

  • Flash Memory

    4GB (Dual boot OS protection)

  • Drive Bay

    2x 3.5-inch SATA 6Gb/s, 3Gb/s

  • Drive Compatibility

    3.5-inch SATA hard disk drives
    2.5-inch SATA hard disk drives
    2.5-inch SATA solid state drives

  • Hot-swappable

    Yes

  • M.2 SSD Slot

    Optional via a QM2 PCIe adapter

  • SSD Cache Acceleration Support

    Yes

  • Gigabit Ethernet Port (RJ45)

    1

  • 5 Gigabit Ethernet Port

    Expandable with an optional PCIe adapter (5G/2.5G/1G/100M)

  • 10 Gigabit Ethernet Port

    Expandable with an optional PCIe adapter

  • Jumbo Frame

    Yes

  • PCIe Slot

    Slot 1: PCIe Gen 2 x4

  • USB 2.0 port

    3

  • USB 3.2 Gen 1 port

    2

  • USB 3.2 Gen 2 (10Gbps) Port

    Optional via a PCIe expansion card

  • IR Sensor

    Yes (Optional QNAP RM-IR004 remote control)

  • HDMI Output

    1, HDMI 2.0

  • Form Factor

    Tower

  • LED Indicators

    Power/Status, LAN, USB, HDD1-2

  • Buttons

    Power, USB copy, Reset

  • Operating temperature

    32 Degree F - 104 Degree F (0 - 40 Degree C)

  • Relative Humidity

    5-95% RH non-condensing, wet bulb: 27 Degree C (80.6 Degree F)

  • Power Supply Unit

    External Power Adapter, 65W, 100-240V

  • Power Consumption: HDD Sleep Mode

    8.08 W

  • Power Consumption: Operating Mode

    15.25 W (Typical)

  • Fan

    1x 70mm

  • Sound Level

    16.7 db(A)

  • System Warning

    Buzzer

  • Kensington Security Slot

    Yes

  • Number of Concurrent Connections

    800 Max

  • Dimensions (H x W x D)

    6.61 x 4.13 x 8.9" (16.78 x 10.49 x 22.6cm)

  • Weight

    3.26 lbs (1.47kg)

Software

Jump to...
  • Operating System

    QTS 4.4.1 (embedded Linux)

  • Supported Client Operating Systems

    Apple Mac OS 10.7 or later
    Linux and UNIX
    Microsoft Windows 7, 8, and 10
    Microsoft Windows Server 2003, 2008 R2, 2012, 2012 R2 and 2016, 2019

  • Supported Browsers

    Apple Safari 7 or later
    Google Chrome
    Microsoft Internet Explorer 10 or later
    Mozilla Firefox

  • Supported Languages

    Chinese (traditional and simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, and Turkish

  • Supported File Systems

    Internal hard drive (EXT4)
    External hard drive (EXT3, EXT4, NTFS, FAT32, HFS+, and exFAT)

  • Network & Virtual Switch

    TCP/IP: Dual stack (IPv4 and IPv6)
    Jumbo frame
    Port trunking (Link aggregation):
    failover
    Load balancing

    DHCP server and client
    RADVD
    USB Wi-Fi adapter
    Virtual switch:
    Network Address Translation (NAT)
    Spanning Tree Protocol (STP)

  • Network & Virtual Switch (Contd.)

    Thunderbolt to Ethernet converter (T2E)
    Software-Defined Switch mode

    Static Route
    NCSI (Network Connectivity Status Indicator)
    DDNS settings (Customize & Multiple Service)

  • Web Server

    HTTP/HTTPS Connections (TLS 1.0/1.1/1.2)
    Supports WebDAV Connection
    Supports Virtual Host (Max: 32)
    Importable SSL Certificate

  • Security

    Network access protection with auto-blocking (SSH, Telnet, HTTP(S), FTP, CIFS/SMB, and AFP)
    Host access control for shared folders (CIFS/SMB)
    AES 256-bit folder-based and volume-based encryptions which are validated by FIPS 140-2 CAVP (Cryptographic Algorithm Validation Program)

  • Security (Contd.)

    256-bit external drive encryption (AES)
    Importing of SSL certificates from Let's Encrypt
    Instant alerts through email, SMS, push service, and audio
    2-step verification

  • Storage Management

    Supported RAID types: RAID 0, 1, JBOD, Single
    RAID Hot Spare and Global Hot Spare
    RAID Rebuild Speed Customization
    Online RAID capacity expansion
    Online RAID level migration
    SSD RAID Over-provisioning
    SSD RAID Performance evaluation (with SSD Profiling Tool)
    SSD TRIM for RAID 0,1
    Bitmap support
    Disk auto S.M.A.R.T. data migration
    Disk bad block scan and S.M.A.R.T test.
    Disk bad block recovery

  • Storage Management (Contd.)

    Disk secure data erase
    Ironwolf Health Management
    Storage pools
    Qtier Data Tiering Technology:
    Automatic or scheduled data tiering
    IO-aware auto tiering
    Shared folder tiering on demand

    Flexible volumes and LUNs with thin provisioning and space reclaiming:
    If the NAS has less than 4GB RAM, then the maximum volume capacity is 144TB.
    If the NAS has at least 4GB RAM, then the maximum volume capacity is 250TB

  • Storage Management (Contd..)

    Online volume expansion
    Volume type conversion
    Volume shrink
    Storage space utilization
    Snapshots:
    Volume and LUN snapshots
    Snapshot Dashboard
    Snapshot Manager
    Snapshot local restore and revert
    Snapshot Clone
    Snapshot Replica and Snapshot Vault
    Snapshot remote restore and revert
    Unified Snapshot Directory

  • Storage Management (Contd...)

    Support for Windows Previous Versions (CIFS/SMB)
    Snapshot Agent for Microsoft Windows and VMware vSphere

    Storage expansion using QNAP expansion units
    JBOD enclosure roaming
    SSD read-only and read-write cache
    SSD write-only cache

  • iSCSI (IP SAN)

    iSCSI targets with multiple LUNs per target
    LUN mapping (LUN can be moved between iSCSI and FC if supported)
    LUN masking
    Online LUN capacity expansion
    SPC-3 persistent reservation
    MPIO & MC/S
    iSCSI LUN backup, one-time snapshot, and restoration
    Virtual disks using iSCSI initiator
    Stack chaining master

  • VJBOD Cloud

    VJBOD Cloud now supports cloud Volume/LUNs
    VJBOD Cloud now supports one-to-one pairing between cloud volumes/LUNs and local stored spaces
    VJBOD Cloud now supports Amazon S3 Azure, BackBlaze, HuaWei Cloud, Alibaba Cloud, HKT, Google Cloud, OpenStack, RackSpace, Wasabi cloud, IBM cloud object storage service

  • VJBOD Cloud (Contd.)

    VJBOD Cloud now supports local stored mode, which means that data can be stored on the NAS and the data can be backed up to the cloud
    VJBOD Cloud now supports 20 recovery points for recovering volumes/LUNs

  • Notification Center

    Added support for sending notifications via SMS center (SMSC) or providers, including Nexmo, Twilio, and Clickatell
    Added Outlook as an SMTP service option
    Added support for sending notifications via instant messaging applications, including Skype and Facebook Messenger
    Added support for Overview and History in Notification Center
    Added support for 23 languages for notification messages

  • Notification Center (Contd.)

    Added support for creating custom notification rules to specify notification criteria, including application categories, severity levels, and keywords
    Delivery method and message recipient settings are now more flexible
    Added support for creating multiple notification rules at the same time
    Added support for sending notifications for a single system event

  • Power Management

    Wake-on-LAN (WoL)
    Standby mode for internal drives
    Scheduled power on and off
    Automatic power on after power recovery
    USB and network UPS support with SNMP management

  • Access Rights Management

    Multiple user creation
    User data importing and exporting
    User quota management
    Local user access control (AFP, CIFS/SMB, FTP, and WebDAV)
    Application access control (File Station, Music Station, Photo Station, and Video Station)
    Subfolder permissions (AFP, CIFS/SMB, FTP, and File Station)

  • Domain Authentication

    Microsoft Active Directory (AD) and domain controller support
    LDAP server and client
    Domain user login (AFP, CIFS/SMB, FTP, and File Station)

  • myQNAPcloud

    Free host name registration (DDNS)
    Optional myQNAPcloud SSL certificates (DDNS)
    Auto router configuration using UPnP
    Web-based file manager with HTTPS 2048-bit encryption
    myQNAPcloud Link for remote access without complex router setup

  • Qsync

    File syncing across multiple devices with SSL secure connection
    Selective synchronization for specific folders or subfolders
    Team folders as file center for better collaboration
    File sharing using email links
    Policy settings for conflicting files and file type filter
    Version control for a maximum of 64 versions

  • Qsync (Contd.)

    Unified privilege and configuration management
    Central configuration mode
    Remote erase and restore
    Qsync client supported platforms: Windows, Mac, Ubuntu, Android and iOS

  • Resource Monitor

    Monitoring of NAS system resources such as CPU, memory and network
    Monitoring of NAS storage resources such as volumes, RAID, and disk activity
    Monitoring of NAS application resource use
    Creation of extra swap space when SSDs are installed

  • Helpdesk

    Reporting of issues to the QNAP support team, with automatic collection of system information
    Remote connection between QNAP support engineers and NAS for issue resolution (with user permission)

  • Web Desktop Administration

    Multi-window, multitasking system management
    Smart toolbar and dashboard for system status display
    SNMP versions 2 and 3
    Resource monitor
    Network recycle bin:
    Recover files deleted using AFP, CIFS/SMB, and File Station
    Automatic cleanup
    File type filter

    Comprehensive logs (events and connections)
    Syslog server and client

  • Web Desktop Administration (Contd.)

    Backup and restoration of system settings
    Qmanager: Mobile application for remote system monitoring and management
    Qboost

  • File Server

    File sharing across Windows, Mac, and Linux/UNIX
    Microsoft networking (CIFS/SMB)
    Apple networking (AFP)
    NFS version 3/4 services
    Windows ACL (CIFS/SMB)
    Advanced folder permissions (AFP, CIFS/SMB, and FTP)
    Shared folder aggregation (CIFS/SMB)

  • FTP Server

    FTP, SFTP and TFTP protocols
    FTP over SSL/TLS (explicit FTPS)
    FXP support

  • File Station

    Integrate with HybridMount which supports File Cloud Gateway and File Station Mount mode. File Station Mount mode supports:
    Cloud drive mounting for Google Drive, Dropbox, Microsoft OneDrive, Microsoft OneDrive for Business, HiDrive, Amazon Cloud Drive, Yandex Disk and Box
    Remote shared folder mounting (CIFS/SMB, FTP, and WebDAV)

    Restore QDFF files and folders with HBS 3

  • File Station (Contd.)

    Document viewing using Office Online, Google Docs, and Chrome extension
    Microsoft Office file editing using Google Docs, Sheets, and Slides
    ISO file mounting (maximum: 256 ISO files)
    Mount smart phones as external storage
    Read access for compatible optical disc drives
    Read access for compatible smartphones (MTP)
    Download and upload link sharing
    File dragging and dropping (Chrome and Firefox)

  • File Station (Contd..)

    Photos, video, and music preview and playback with hardware-accelerated transcoding
    File compression (ZIP and 7z)
    Download link creation and sending for publicly shared files, with expiration date and password protection
    Subtitle display (SRT and UTF-8)
    Video seeking during on-the-fly transcoding video playback
    Slideshow playback in media viewer

  • File Station (Contd...)

    Convert image files to pdf by "Image2PDF" integration
    Qfile: Mobile app for file browsing and management

  • Qfiling

    Auto filing
    Recipe function
    Archiving through iSCSI, USB, DVD and remote NAS
    Advanced settings:
    Source File Filters
    File Editing
    File deletion
    Data integrity check
    File conflict policy

  • HBS (Hybrid Backup Sync)

    Cloud storage backup to Amazon Glacier, Amazon S3, Azure Storage, Google Cloud Storage, HKT Object Storage, OpenStack Swift, WebDAV
    Cloud storage syncing with Alibaba Cloud, Amazon Drive, Amazon S3, BackBlaze B2, Box, Dropbox, OneDrive, Google Drive, HiDrive, hubiC, OneDrive, OneDrive For Business, ShareFile, Yandex Disk
    RTRR server & client with bandwidth control
    Rsync server with download bandwidth control

  • HBS (Hybrid Backup Sync) (Contd.)

    Remote server syncing (CIFS/SMB, FTP, Rsync, and RTRR)
    Scheduled backup to local and remote storage spaces
    Backup versioning
    Encryption, compression, and file filters
    Centralized management for backup, restoration, and sync jobs
    Support for Apple Time Machine
    Data backup to multiple external storage devices

  • HBS (Hybrid Backup Sync) (Contd..)

    Desktop backup with QNAP NetBak Replicator for Windows
    Support for the following third-party backup software: Veeam Backup & Replication, Acronis True Image, Arcserve Backup, Retrospect, Nakivo Backup & Replication, and Veritas Backup Exec

  • Multimedia Console

    Integrating indexing, transcoding, thumbnail generation, and content management
    New content management design, configuring content sources for QTS multimedia applications
    View the status of multimedia apps and services all on the same screen
    Video transcoding (240p, 360p, 480p, 720p and 1080p resolution)
    Video2Audio transcoding

  • Multimedia Console (Contd.)

    Automatic video transcoding for watched folders
    Hardware-accelerated transcoding
    Embed subtitles into videos for background transcoding

  • QuMagie

    Browse photos in timeline view or folder view
    Virtual albums and smart albums
    AI-assisted photo management, classifying people, things, places, etc.

  • Photo Station

    Photo organization by thumbnail, list, timeline, or folder
    Virtual and smart albums
    Validity control for album sharing
    Photo tagging with text, colors, and ratings
    Slideshows with background music and transition effects
    Album configuration backup and restoration
    Advanced folder permissions
    Support for domain users
    Qphoto: Mobile application for online browsing and sharing

  • Music Station

    Music playing and sharing through web browsers
    Music streaming to multiple devices
    Changing of album covers through Google search or by uploading photos
    Internet radio (MP3)
    Eight music alarms
    Switching between spotlight mode and manage mode
    Advanced search
    Scrolling lyrics
    Qmusic: Mobile application for music streaming and management

  • Video Station

    Video organization by thumbnail, list, timeline, or folder
    Virtual and smart collections
    Video tagging with text, colors, and ratings
    Video link sharing through social media and email
    Movie information and poster display from Internet sources or user-uploaded files
    Subtitle display (SRT, ASS, SSA)
    Subtitle search and downloading
    Subtitle file importing
    Subtitle display style adjustment
    Playback speed adjustment

  • Video Station (Contd.)

    Direct video streaming for certain file formats
    Facebook login
    Advanced folder permissions
    Support for LDAP users
    Video uploading to YouTube and Youku
    Multi-zone video display
    Video-seeking support for video playback during on-the-fly transcoding
    Qvideo: Mobile application for online video browsing and management

  • Virtualization Station

    Virtual machine creation (Windows, Linux, Unix, and Android)
    Virtual machine importing, exporting, cloning, snapshot capturing, backup, and restoration
    Console display using HDMI output (QVM)
    HTML5-based shared remote console
    Various networking modes using virtual switches

  • Container Station

    Support for LXC and Docker
    Application downloading from the built-in Docker Hub Registry
    One-click installation
    Container importing and exporting
    Console mode Three networking modes (Note: Docker containers support Bridge, NAT, and Host mode. Linux containers (LXC) support only NAT.)
    Auto-start containers
    Docker certificate downloading
    Private registry addition

  • Container Station (Contd.)

    Application repository for switching to any repository on GitHub.com

  • Qsirch

    Full-text search
    Data distribution using a bar chart
    Previews for photos, music, videos, PDFs, Gmail, and others
    Advanced search operators and search scope
    Customized search filters with included or excluded conditions
    Related files suggestion in Viewer
    Chrome, Firefox and Safari extension

  • QVR Pro

    Free 8 built-in camera channels for all models
    Expandable up to 128 camera channels
    (QVR Pro Gold license required)
    Support for using QVR Pro as the motion detector
    Camera management across different networks
    Pre-allocation of dedicated recording spaces
    User-defined trigger events and corresponding actions
    Data sources paired with cameras for quick search

  • QVR Pro (Contd.)

    Network interfaces assigned to each camera for recording sessions
    Support for RTSP and WebRTC
    Support for exporting and importing camera connection information as CSV files
    Integration with QVR Pro Client for viewing live and recorded surveillance videos
    Daily auto backup for QVR Pro configuration files
    Support for importing recordings

  • QVR Pro Client (Desktop)

    Instant switch between Live and Playback modes
    Dynamic and adjustable layouts for camera and E-map views
    Qdewarp technique for dewarping fisheye and 360-degree cameras
    Region of interest for each channel
    Support for adding and editing cameras on QVR Pro Client
    Hardware acceleration for fisheye cameras
    Video wall (up to 8 monitors)
    Hardware acceleration on Windows, Mac, Ubuntu, and HybridDesk Station

  • QVR Pro Client (Desktop) (Contd.)

    Multithreaded decoding
    Synchronized video playback
    Support for specifying exported recordings on the timeline
    Virtual keyboard (for HybridDesk Station version)
    Support for playing back recordings on deleted channels
    Notification messages for changes in system time zone on QVR Pro
    Server dashboard (when connected to QVR Center)
    Playback control via the keyboard (space and arrow keys)

  • QVR Pro Client (Desktop) (Contd..)

    Support for displaying camera locations and event notifications on e-maps
    Support for selecting the format of export files
    Support for 2-step verification
    Cross-platform support: Windows, macOS, Ubuntu, QNAP HybridDesk Station

  • QVR Pro Client (Mobile)

    Instant switch between Live and Playback modes
    Cross-platform support: Android and iOS
    Various advanced monitoring options, including sequential mode, PTZ control, auto cruising, and preset point control
    Support for receiving Instant push notifications
    Support for displaying camera locations on e-maps
    Server dashboard that displays NAS information, camera status, and recording space status

  • QVR Center

    Support for managing up to 128 QVR Pro servers (QVR Pro Gold license required)
    Statistical graphics for visualizing event data
    Log management for all added servers
    Integration with QVR Pro Client for central monitoring across multiple servers
    Centralized views using cameras from multiple servers
    Backward compatibility with Surveillance Station and VioStor NVR

  • QVR Guard

    Failover solution designed for QVR Pro to ensure server availability
    Viewing task details during the failover period
    Automatic switch between Standby and Takeover modes based on the QVR Pro server status

  • QVR Pro CamPack

    Support for more camera manufacturers and models

  • QUSBCam2

    Support for configuring USB webcams as ONVIF IP cameras (remotely manageable)
    Support for monitoring live views (no other apps required)
    Support for RTSP

  • Surveillance Station

    Support for up to 5,000 IP cameras
    2 free camera licenses
    Instant playback for recent surveillance events
    Visual options for e-maps
    Playback speed control
    Supporting for displaying preview snapshots on the timeline
    Intelligent video analytics (IVA) for advanced video searching
    Surveillance client designed for macOS

  • Surveillance Station (Contd.)

    Mobile surveillance application (Vmobile) for iOS and Android
    Mobile recording application (Vcam) for iOS and Android

  • QVPN Service

    VPN server:
    Friendly graphical overview page
    Secure remote access with PPTP, L2TP/IPSec, OpenVPN, QBelt(QNAP proprietary) protocol
    Support for a maximum of 100 clients
    Support public/ NAS default/ manually DNS server
    Support manually assign/auto detect/none outgoing network interface
    Support privilege settings for domain/Local users

  • QVPN Service (Contd.)

    VPN client:
    Support PPTP, L2TP/IPSec, OpenVPN, QBelt(QNAP proprietary) protocol
    Support using VPN as a NAS default gateway
    Support connection log check

    Support utility and Mobile apps for Windows, Mac, iOS, Android

  • DLNA Server

    Support for DLNA/UPnP TVs and players such as PlayStation 4 and Xbox One
    Support for CUE indexing file for APE and FLAC

  • Q'center (NAS CMS)

    Monitoring of multiple NAS devices
    Utilization history reports
    Unified configuration management
    Monitoring of NAS devices behind NAT routers with Connect to Q'center

  • Qfinder Pro

    QNAP NAS location on the same local network
    NAS shared folder mounting
    Basic setting configuration (firmware, SMTP server, and network settings)
    Storage Plug & Connect (Windows only):
    Creation and mapping of NAS shared folders
    Creation of and connection to iSCSI targets and LUNs

    Media upload (Windows only):
    Media file upload to the NAS
    Automatic creation of thumbnails or transcoding of videos using the computer

  • Chromecast

    Video, photo and music streaming to Apple TV (via Qmedia) or Chromecast using the following:
    NAS applications: File Station, Music Station, Photo Station, and Video Station
    Mobile applications: Qfile, Qmusic, Qphoto, and Qvideo

  • Download Station

    PC-less downloads (BitTorrent, FlashGet, FTP/FTPS, HTTP/HTTPS, QQDL, and Thunder)
    BitTorrent: Support for search, magnet links, private trackers, and proxy
    Scheduled download and bandwidth control
    RSS subscription and download (broadcatching)
    Support for add-ons that extend download functionality
    Qget: Mobile application for download browsing and management

  • Notes Station 3

    Insert Evernote Notes in Notes Station 3
    Enable Embedding YouTube video into Notes
    Table creation using the insert table editor

  • HD (HybridDesk) Station

    Photo, video, and music playback on TV through HDMI
    Support for Chrome and Firefox
    Support for international keyboards and mouse input
    User login permissions

  • Linux Station

    Usage of the NAS as a Linux-based computer
    Support for Ubuntu 14.04, Ubuntu 16.04 and Ubuntu Kylin 16.04
    Application downloading and usage from the Ubuntu Software Center
    Remote desktop for remote monitoring and accessing of Ubuntu

  • Qcontactz

    One-way scheduled sync of contacts from multiple Google accounts
    Contact importing from CSV or vCard 3.0 files
    Contact exporting to CSV or vCard 3.0 files
    Duplicate contact searching and merging
    Contact management: Groups, favorites, lock, search, delete and restore
    Support for Android and iOS

  • IFTTT Agent

    Daily task automation
    Social media data archiving
    File synchronization between the NAS and various cloud services
    System event notifications on Line, Skype, Gmail, and mobile phones
    Music playback on Music Station using Amazon Echo voice commands
    Usage of motion detection sensors as trigger for camera recording on Surveillance Station

  • Qmiix Agent

    File synchronization between the NAS and various cloud services
    View miixes made using the Qmiix web portal that include triggers and actions involving QNAP apps
    Create miixes for web-based and NAS-related apps
    Create miixes on the Qmiix web portal that include File Station, a QNAP app
    System event notifications on Line, Skype, Gmail, and mobile phones

  • Security Counselor

    Multiple Security Policies
    Basic/Intermediate/Advanced/Custom)
    Checks NAS settings for security weaknesses
    Integrates with existing anti-virus services
    Integrates with existing anti-malware services
    Integrates with the Security Advisory service

  • Malware Remover

    Detects and removes malware from your QNAP NAS

  • App Center

    Official and community software add-ons
    Automatic updates and notifications for new versions
    Repository for imported third-party content
    User-specified volume for storing applications

  • General Notes

    Designs and specifications are subject to change without notice
    Some features may vary by model
    QTS does not support DRM content and some IPv6 services
    Some data encryption features may be unavailable because of country-specific legislative restrictions

  • Deprecated Features

    The following features are deprecated but will continue to function until completely removed in a future release. QNAP recommends planning now for the future removal of support:
    Telnet
    Support for wireless ad hoc networks

  • UPC Code

    885022018680

About QNAP TS-251D

FEATURED REVIEWS

Best for price

By Andrei M.

Easy to connect, friendly interface, ram ddr4 up to 32GB, small and powerful box.

Great personal use NAS

By SEAN R.

Replaced a 7yr old Qnap with this and love it! Obviously much faster than my old one, and this one supports Plex. Was able to get that setup and stream movies and music. Does everything I was hoping it would do.

TS 251 D

TS-251D

Intel Dual-Core Multimedia NAS With A PCIe Slot For Extending NAS Functionality.

The TS-251D integrates secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251D allows you to flexibly extend NAS functionality and potential applications. You can enhance overall system performance by installing a QNAP QM2 card for M.2 SSD caching/10GbE connectivity combined with Qtier auto-tiering storage and installing a 10GbE/5GbE/2.5GbE network expansion card. In addition, TS-251D can be used with QNAP’s smart AI photo management application, QuMagie, which integrates AI image recognition to group similar photos together in album “People”, “Things” and “Places”. The TS-251D features an HDMI slot to stream multimedia throughout your home. The TS-251D supports dual-channel hardware decoding and transcoding, allowing you to view NAS media files smoothly across various devices.

Smart AI Photo Management.

QuMagie integrates QuMagie Core AI image recognition technology for facial recognition, subject identification, and geotagging photos. Similar photos are categorized into People, Places, and Things albums. Moreover, QuMagie features a built-in timeline scroll, customizable folder covers, iOS Live Photo display and a powerful search tool, to provide you with the ultimate photo management and image sharing solution.

Smart AI Photo Management.

Real-Time 4K Video Transcoding.

Featuring advanced Intel UHD Graphics, the TS-251D supports dual-channel 4K hardware decoding and real-time transcoding, allowing you to convert videos to universal file formats that can be smoothly played across various devices*. You can also watch high-quality 4K media files on an HDTV using the HDMI output or with Plex Media Server to stream media files to mobile devices and media streaming devices (including DLNA, Roku, Apple TV (via Qmedia), Amazon Fire TV and Chromecast). The QNAP RM-IR004 remote control (sold separately) can be configured using QButton to customize individual button actions, providing a more user-friendly NAS experience.

Real-Time 4K Video Transcoding.
Multiple Ways To Enjoy Your Multimedia.

Multiple Ways To Enjoy Your Multimedia.

QNAP provides a wide range of multimedia applications for you to easily enjoy photos, music, and videos.

  • Multimedia Console consolidates all QTS multimedia applications into one app for easier and centralized multimedia app management.

  • Cinema28 enables single-interface management of all media files and can stream files to every connected device throughout your home.

  • Qmedia allows music, photos and videos to be effortlessly streamed to Android TV, Apple TV (via Qmedia), and Amazon Fire TV or set-top boxes.

Easy and Secure File Management.

Easy and Secure File Management.

File Station centralizes files stored on your TS-251D and in the cloud. You can easily upload files from your computer, drag and drop files between folders, rename files, delete files, and configure file and folder permissions to prevent unauthorized access. Moreover, with Microsoft Office Online you can open and modify Microsoft Office documents stored on the TS-251D, without having to download Word documents, Excel worksheets, and PowerPoint presentations from your NAS to the PC. When it comes to sharing sensitive or confidential files on the TS-251D, you can use File Station to enhance data security effectively by encrypting files into a .qenc file, set a password, and then have file recipients use QENC Decrypter to decrypt the sent file.

Multi-Point File Backup, Access & Sync.

The TS-251D stores data and files centrally, and supports file sharing protocols, including SMB/CIFS, AFP and NFS for Windows, Mac, and Linux/UNIX devices. Coupled with Qsync (a utility that transforms a QNAP NAS into a secure, high-capacity data center for file synchronization) any file uploaded to the TS-251D becomes available for all linked devices, such as computers, laptops, and mobile devices. Hybrid Backup Sync helps you easily backup or synchronize data on the TS-251D to another QNAP NAS, remote servers, or cloud storage for disaster recovery. Additionally, QuDedup technology greatly improves the efficiency of multi-version backup to the destination storage, while optimizing storage utilization. You can install the QuDedup Extract Tool on your computer and restore deduplicated files to their normal status.

Multi-Point File Backup, Access, and Sync
Protect Important Data With Snapshots.

Protect Important Data With Snapshots.

Snapshots help protect your data by fully recording the NAS system state and metadata. You can use snapshots to quickly restore files to a previously-recorded state when files are accidentally deleted or modified, or when the system is compromised by ransomware. QNAP snapshots are block-based and only record modified data. Not only does this save storage space, but also reduces the time required to back up and restore data.

Extend NAS Functionality With The PCIe Slot.

Extend NAS Functionality With The PCIe Slot.

With a PCIe expansion Gen 2.0 x 4 slot, the TS-251D provides flexibility in extending NAS functionality and potential applications. To optimize system performance, install a QNAP QM2 card for M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance. You can also use the TS-251D as a wireless access point by installing a compatible QNAP QWA-AC2600 wireless network card to create a wireless media streaming environment. Moreover, by configuring the QXG-10GbE/5GbE network expansion cards, you can upgrade your network to high-speed connectivity with an existing CAT 5e cable. Alternatively, you can add an affordable QNAP QNA-UC5G1T USB 3.2 Gen 1 to 5GbE adapter to your TS-251D and laptop to enjoy higher network speeds, or boost the USB connectivity of the TS-251D by installing a USB 3.2 Gen 2 (10Gbps) card.

QVR Pro Img

QVR Pro Safeguards Your Environment

QNAP’s QVR Pro surveillance solution allows you to arrange dedicated, independent storage space for surveillance data on the TS-251D and leverages scalable storage advantages. With QVR Pro, camera management, storage space allocation, camera live view, and playback is greatly simplified. You can also use USB webcams as network cameras with the QUSBCam2 app, and remotely monitor surveillance feeds anytime with QVR Pro Client mobile app.

What's in the box:

  • TS-251D 2-Bay NAS Enclosure
  • Ethernet Cable
  • AC Adapter
  • Power Cord
  • 8x Flat Head Screw (for 3.5 " HDD)
  • 6x Flat Head Screw (for 2.5 " HDD)
  • Quick Start Guide
  • Qnap 2 Year Limited Warranty