QNAP TS-251B 2-Bay Home/SOHO NAS with PCIe Expansion Slot, 4GB RAM (1x 4GB), Supports 2x 3.5" SATA Gbps HDD, RAID 0/1/JBOD/Single

SKU: QNTS251B4GUS

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QNAP TS-251B Specifications

Hardware

Hardware

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  • CPU

    Intel Celeron J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz)
    Architecture: 64-bit x86

  • Graphics

    Intel HD Graphics 500

  • Encryption Acceleration

    Yes (AES-NI)

  • System Memory

    4GB DDR3L (1x 4GB)

  • Maximum Memory

    8GB (2x 4GB)

  • Memory Slot

    2x SODIMM DDR3L up to 1866, with dual-channel support

  • Flash Memory

    4GB eMMC

  • Drive Bay

    2x 3.5" SATA 6 Gbps HDD

  • Drive Compatibility

    3.5" SATA 6Gb/s HDD
    2.5" SATA 6Gb/s HDD
    2.5" SATA 6Gb/s SSD

  • SSD Cache Acceleration Support

    3.5" drive bay: 1 to 2

  • Gigabit Ethernet Port

    1x RJ45

  • USB Port

    2x USB 3.0, 3x USB 2.0

  • USB One Touch Copy

    Front: USB 3.0 Type-A

  • PCIe Slot

    1 PCIe 2.0 x2 slot

  • HDMI Output

    1x HDMI v1.4b (up to 3840 x 2160 resolution at 30Hz)

  • IR Sensor

    Yes, supporting Qnap RM-IR004 remote control (optional purchase)

  • Audio

    1x Speaker, 2x MIC Input
    1x 3.5mm line-out jack
    Alarm buzzer

  • LED Indicators

    Status/power, LAN, USB, HDD 1 - 2

  • Buttons

    Power, Reset, USB One-touch-copy

  • System Warning

    Alarm buzzer and voice prompts

  • Form Factor

    Tower

  • Power Consumption

    HDD standby: 8.08W
    In operation: 15.25W (with 2x 1TB HDDs installed)

  • Sound Level

    Sound pressure (LpAm): 17.3 dB(A)

  • Power Supply Unit

    65W AC adapter, 100-240V

  • Fan

    1x 7cm (2.76")

  • Operating Temperature, Relative Humidity

    0 to 40 deg. C (32 to 104 deg. F), 5 to 95% RH non-condensing, Wet bulb: 27 deg. C (80.6 deg. F)

  • Other Interfaces

    Kensington security slot

Software

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  • Operating System

    QTS 4.3.4 (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

  • 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 (failover, multi-IP settings, port trunking/NIC teaming)
    DHCP server and client
    USB Wi-Fi adapter
    Virtual switch: Virtual switch editing in Virtualization Station, Combining virtual machines and containers in the same virtual switch, Network Address Translation (NAT), Spanning Tree Protocol (STP)
    WirelessAP Station

  • 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)
    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

    Storage space utilization monitoring
    Flexible volumes and LUNs with thin provisioning and space reclaiming
    Supported RAID types: RAID 0, 1, JBOD, Single
    RAID hot spare and global hot spare
    RAID rebuild speed customization
    Advanced secure data erase
    Storage pools
    Qtier Technology (automated storage tiering): Automatic or scheduled data tiering, IO-aware auto tiering, Shared folder tiering on demand

  • Storage Management (Cont.)

    Snapshots: Volume and LUN snapshots, Snapshot Dashboard, Snapshot Manager, Snapshot cloning, Snapshot Vault, Snapshot Replica, Unified Snapshot Directory, Support for Windows Previous Versions (CIFS/SMB), Snapshot Agent for Microsoft Windows and VMware vSphere
    Online volume expansion
    Online storage pool expansion
    Online RAID capacity expansion
    Online RAID level migration

  • Storage Management (Cont..)

    SMART data migration
    Storage expansion using Qnap expansion units
    JBOD enclosure roaming
    SSD read-only or read-write cache
    Bad block scan and hard drive S.M.A.R.T test.
    Bad block recovery and RAID recovery
    Bitmap support

  • iSCSI (IP SAN)

    iSCSI targets with multiple LUNs per target
    LUN mapping and masking
    Online LUN capacity expansion
    SPC-3 persistent reservation
    MPIO & MC/S
    iSCSI Extensions for RDMA (iSER) with VMware ESXi
    iSCSI LUN backup, one-time snapshot and restoration
    Virtual disks using iSCSI initiator
    Stack chaining master

  • 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
    CloudLink 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
    Unified privilege and configuration management
    Central configuration mode
    Remote erase and restore
    Windows and Mac OS support

  • 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 Administration

    Multi-window, multitasking system management
    Smart toolbar and dashboard for system status display
    Dynamic DNS (DDNS)
    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
    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
    Windows ACL
    Advanced folder permissions (AFP, CIFS/SMB and FTP)
    Shared folder aggregation (CIFS/SMB)

  • FTP Server

    FTP over SSL/TLS (explicit)
    FXP support

  • File Station

    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)
    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)

  • File Station (Cont.)

    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)
    Photos, video and music preview and playback with hardware-accelerated transcoding

  • File Station (Cont..)

    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
    Qfile: Mobile app for file browsing and management

  • Qfiling

    Auto filing
    Recipe function
    Archiving through iSCSI, USB, DVD and remote NAS
    Advanced settings: File deletion, Intelligent subtitle filing for videos, Data integrity check, File conflict policy

  • Transcode Management

    Video transcoding (240p, 360p, 480p, 720p and 1080p resolution)
    Automatic video transcoding for watched folders
    Hardware-accelerated transcoding
    Embed subtitles into videos for background transcoding

  • Hybrid Backup Sync

    Cloud storage backup to Amazon S3, Amazon Glacier, Microsoft Azure, Google Cloud Storage, Openstack Swift, WebDAV and HKBN
    Cloud storage syncing with Microsoft OneDrive, Google Drive, Dropbox, Amazon Drive, Yandex Disk, Box, hubiC, BackBlaze B2, Amazon S3 and HiDrive
    RTRR server & client with bandwidth control
    Rsync server with download bandwidth control
    Remote server syncing (CIFS/SMB, FTP, Rsync and RTRR)
    Scheduled backup to local and remote storage spaces

  • Hybrid Backup Sync (Cont.)

    Backup versioning (RTRR)
    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
    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

  • Cloud Drive Sync

    Support for the following cloud services: Google Drive, Dropbox, OneDrive, OneDrive for Business and hubiC
    Add and manage multiple cloud accounts
    Manual, scheduled, periodic and continuous sync
    Flexible file filtering using type, date and size
    SSL transfer encryption
    Dashboard and job statistics
    Configurable network error recovery options

  • Cloud Drive Sync (Cont.)

    Extensive job activity logging for tracing history of status and statistics
    Concurrent job execution and multi-threaded data transfer
    Bandwidth throttling for individual accounts

  • 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
    Photo geotagging and display on Google Maps
    Photo and video uploading to Picasa, Flickr and Weibo
    Album configuration backup and restoration

  • Photo Station (Cont.)

    Advanced folder permissions
    Support for domain users
    Photo Station Extension: Supports face detection and PDF to image
    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

  • iTunes Server

    Audio and video sharing for Windows & Mac iTunes

  • 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

  • Video Station (Cont.)

    Playback speed adjustment
    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

  • Cinema28

    Supports streaming of audio, video and photos
    Uses Qsirch to improve file searches
    Includes Basic and Advanced usage modes
    Supports streaming from multiple sources: NAS, USB storage devices, Blu-ray/DVD players, mobile devices, SD cards, FTP, SMB (CIFS) and WebDAV
    Supports streaming to multiple media devices: Apple TV, Chromecast, DLNA, Qnap HD Player, HDMI, audio line out, Bluetooth and USB DAC

  • 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

    Supports 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
    Auto-start containers
    Docker certificate downloading
    Private registry addition
    Application repository for switching to any repository

  • 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
    Search Chrome extension

  • QVR Pro

    Support for up to 128 camera channels
    Camera management across different networks
    Pre-allocation of dedicated recording spaces
    Specifying trigger events and corresponding actions
    Data sources paired with cameras for quick search

  • QVR Pro Client

    Instant switch between Live and Playback modes
    Dynamic and adjustable layouts for camera views
    Support for multiple platforms, including Windows, macOS, Ubuntu, Qnap HybridDesk Station, Android and iOS

  • 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

  • QVR Guard

    Failover solution designed for QVR Pro to ensure server availability
    Viewing task details during the failover period

  • Surveillance Station

    Support for over 5,000 IP cameras
    Two free camera licenses
    Instant playback for checking of recent events
    Visual aid using e-map
    Playback and speed control using the shuttle bar
    Video preview on playback timeline
    Intelligent video analytics (IVA) for advanced video searching
    Surveillance client for Mac
    Vmobile: Mobile surveillance application for iOS and Android
    Vcam: Mobile recording application for iOS and Android

  • QVPN Service

    VPN server: Secure remote access with PPTP, L2TP/IPSec and OpenVPN services; Support for a maximum of 100 clients; Support for domain users
    VPN client: Support for PPTP, L2TP/IPSec and OpenVPN VPN protocols; OVPN file importing for creation of OpenVPN connections
    Easy VPN connection (Windows VPN utility)

  • 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

  • OceanKTV

    YouTube video streaming
    Sorting by artist, language and favorites
    Effects such as tuning echo, key and applause
    Playlist control with a mobile application
    Support for keyboard and remote control (RM-IR004)

  • 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

  • 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

  • AirPlay & Chromecast

    Video, photo and music streaming to Apple TV 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

    Multi-user text editing using the collaborative editor
    Table creation using the spreadsheet editor
    Online quick preview of multimedia attachments
    Smart snapshot for version control

  • HD (HybridDesk) Station 3.13

    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
    Snapshot management for contacts database
    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

General

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  • Dimensions (HxWxD)

    168 x 105 x 226mm (6.61 x 4.13 x 8.90")

  • Weight

    1.53kg (3.37 lbs)

  • UPC Code

    885022015672

About QNAP TS-251B

The TS-251B combines secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is Qnap's first home/SOHO NAS that allows you to flexibly extend its functionality and potential applications. You can install a Qnap QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the Qnap QWA-AC2600) to turn the TS-251B into a wireless access point and to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding and transcoding, allowing you to enjoy watching NAS media files smoothly across various devices.

Intel Celeron J3355 dual-core processor and AES-NI hardware encryption
Powered by a 14nm Intel Celeron J3355 dual-core 2.0GHz processor (burst up to 2.5 GHz), 4GB DDR3L RAM (up to 8GB), a single Gigabit LAN port and supporting SATA 6Gb/s hard drives, the TS-251B provides dependable performance of up to 672 MB/s read/write speeds. The TS-251B features Intel AES-NI hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while ensuring the security of sensitive data stored in the TS-251B.

Extend NAS functionality with the PCIe slot
With a PCIe expansion slot, the TS-251B provides flexibility in extending NAS functionality and potential applications. Install a Qnap QM2 card to provide M.2 SSD caching/10GbE connectivity and use with Qtier tiered storage for optimal system performance; use the TS-251B as a wireless access point by installing a compatible wireless network card (such as the Qnap QWA-AC2600) to create a wireless media streaming environment; or boost the USB connectivity of the TS-251B by installing a USB 3.1 Gen 2 (10Gbps) card.

A tailor-made private wireless network that meets your needs
By installing the QWA-AC2600 and WirelessAP Station app, your NAS will evolve into a high-performance wireless access point that can be connected to from multiple devices. The QWA-AC2600 can also be used to extend your wireless network coverage. Combined with useful features (including DHCP and NAT) provided by the Network and Virtual Switch app, the QWA-AC2600 can be used for a variety of applications, delivering private, fast, low-latency and secure connectivity across your home and/or workplace. (WirelessAP Station requires Container Station to be installed on your Qnap NAS).

Boost your Wi-Fi coverage
Deploy your Qnap NAS as a wireless access point to improve coverage. With the QWA-AC2600 and the WirelessAP Station app, your NAS is transformed into a high-performance wireless access point. Just place the NAS in a more centralized location and it will help lengthen the reach of your existing Wi-Fi network and eliminate potential dead zones.

Directly access your NAS
With the QWA-AC2600 and the WirelessAP Station app, your NAS can perform as a high-performance wireless access point that can be accessed by multiple devices. Your devices can directly access data stored on the NAS and in bypassing the router, access speeds to the network will not be affected.

Upgrade your network to 10GbE with QNAP's fast and affordable 10GbE Switch
QNAP 10GbE/NBASE-T unmanaged switches allow you to instantly upgrade your network environment at a cost-effective price. With a 10GbE network you can enjoy blazing-fast transfer speeds, empower bandwidth-demanding tasks like virtualization and enable simultaneous real-time access to large NAS-based files using multiple workstations (ideal for video editing and multimedia). Qnap also provides a 10GbE PCIe network expansion card for the TS-251B and Windows/Linux PCs to take advantage of high-speed LAN environments.

Real-time 4K video transcoding
Featuring advanced Intel HD Graphics, the TS-251B supports dual-channel 4K H.264 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 at 30FPS media files on a HDTV using the HDMI output or use with Plex Media Server to stream media files to mobiles devices and media streaming devices (including DLNA, Roku, Apple TV, Amazon Fire TV and Chromecast). The Qnap RM-IR004 remote control (sold separately) can be configured using QButton to customize the actions of individual buttons, providing a more convenient NAS experience.

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

• Cinema28 allows for single-interface management of all your media files and can stream files to every connected device throughout your home
• QVHelper allows users to stream media files or music playlists from a Qnap NAS to VLC player
• Qmedia allows music, photos and videos to be effortlessly streamed to Android TVs or set-top boxes
• Video HD is a free KODI add-on that combines KODI's streaming and video decoding capabilities and fully supports Video Station's features

Protect important data with snapshots
Snapshots help protect your data by fully recording the NAS system state and metadata. If files are accidentally deleted or modified or the system is afflicted by ransomware, you can use snapshots to quickly restore files to a previously-recorded state. Qnap snapshots are block-based and only record the changed data. Not only does this save storage space but also reduces the time required to back up and restore data. The TS-251B supports up to 1,024 snapshots per NAS and up to 256 snapshots per volume or LUN.

Consolidated notifications and extra NAS security
QTS 4.3.5 provides various mechanisms to ensure the data saved on your TS-251B is carefully safeguarded, including the brand-new Notification Center that consolidates system logs and notifications into a single app and the Security Counselor that checks for weaknesses and offers helpful security recommendations.

Automate everyday tasks with IFTTT Agent
QNAP IFTTT Agent integrates the popular web automation service IFTTT (If This Then That), allowing you to create a near-unlimited number of automated workflows. Simply connect your IFTTT account with your TS-251B and set triggers and actions. For example, if you set a trigger as "Any new photo on the phone" and the action as "Upload the photo to Qnap NAS," then all the photos taken using your phone will be automatically uploaded to TS-251B.

Multiply your productivity
The app-driven QTS operating system provides solutions for simplifying file backup, management, search and more. With File Station you can view and manage your files from NAS and multiple storage devices; the OCR Converter allows you to extract text from images; Qfiling helps automate file organization and Qsirch helps quickly find files.

Centralized File Management
Use File Station to directly access files on USB devices - including optical disc drives. Files from different devices can be easily viewed and managed on a single interface.

File Digitization
OCR Converter extracts text from images, helping to boost productivity and making it easier to find files.

Smart Filing
Qfiling automates file organization. Files are automatically archived into folders based on your settings.

Full-text Search
Qsirch quickly finds images, music, videos, documents, emails and other files.

Multi-point file backup, access and sync
The TS-251B centrally stores data and files and supports SMB/CIFS, AFP and NFS protocols for file sharing across Windows, Mac and Linux/UNIX devices. Coupled with Qsync (a utility that turns a Qnap NAS into a safe, high-capacity data center for file synchronization) any file uploaded to the TS-251B will be made available for all linked devices, such as computers, laptops and mobile devices. Hybrid Backup Sync can help you easily backup or synchronize data on the TS-251B to other Qnap NAS, remote servers, or cloud storage for easy disaster recovery.

QVR Pro safeguards your environment
QNAP s QVR Pro surveillance solution allows you to arrange a dedicated, independent storage space for surveillance data on TS-251B and leverage the advantages of scalable storage. 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 your surveillance feeds at any time with QVR Pro Client s companion mobile app.

NAS as a Multi-OS Platform
Virtualization Station and Container Station provide comprehensive solutions for creating virtualized environments to improve business IT infrastructure, workflows and productivity.

Flexible and economical storage expansion
You need an easy solution to increase storage capacity when running out of space. Qnap provides several ways to expand your NAS storage as needed to accommodate data and business growth.

Upgrade RAID Capacity
Hot swap lower-capacity drives with larger-capacity drives so that your Qnap NAS can grow with your business.

VJBOD
Use VJBOD (Virtual JBOD) to expand your storage capacity by using the unused storage of other Qnap NAS. Up to 8 Qnap NAS can be mounted as local disks on the TS-251B.

Attach Expansion Enclosures
Connect two 2-bay TR-002 USB hardware RAID external enclosures and use the Storage & Snapshots Manager to easily handle NAS capacity expansion.

QNAP TS-251B Features

  • The PCIe port supports installing a 10GbE network card, a QM2 dual-port M.2 SSD/10GbE card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card
  • 4K media playback and online transcoding; cross-device multimedia viewing via HDMI output or streaming applications
  • Snapshots fully record the system status and data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data
  • Hybrid Backup Sync consolidates backup and sync tasks into a single app, providing multiple layers of data protection
  • Remotely access the apps and files on your TS-251B via myQNAPcloud and easily manage and share files
  • Supports containerized applications and hosting virtual machines with various operating systems

What's in the box:

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