Product Model: TS-451U-1G

4-Bay TurboNAS, dual-core Celeron 2.41GHz (up to 2.58GHz), 1GB DDR3L RAM (max 8GB), 2x GbE LAN, hot-swappable SATA 6Gb/s, HDMI, QvPC, hardware transcoding, single power, without rail kit

    The TS-451U, featuring the easy-to-use QTS operating system, is an affordable, reliable and scalable 4-bay rackmount NAS designed for small offices and home offices, assisting in daily operations including file storage, backup, sharing, synchronization, and more. The TS-451U supports SATA 6Gb/s drives and delivers high performance with persistent throughput, providing a comprehensive storage solution for users to build a private cloud to access their data easily.

    • Manage, share, and back up business data with Real-time Remote Replication (RTRR)
    • Enhanced data security with high-performance AES 256-bit encryption and anti-virus
    • Expand the total raw storage capacity up to 128TB with the economical UX-1200U-RP QNAP expansion enclosure
    • Use the TS-451U with exclusive QvPC Technology
    • Run multiple Windows/Linux/UNIX/Android-based virtual machines with the Virtualization Station
    • Creatively present your animated content and advertisements with the Signage Station

    Dual-core 2.41GHz processor for higher performance

    Powered by a 22nm 64-bit dual-core Intel® Celeron® 2.41GHz processor with 1GB energy-efficient DDR3L RAM (upgradable to 8GB), coupled with the support of SATA 6Gb/s, 2 Gigabit LAN ports and HDMI output, the TS-451U is a powerful NAS that delivers up to 224 MB/s read & write speeds with dual LAN ports. The TS-451U can also automatically increase the processor’s clock rate from 2.41GHz to 2.58GHz when needed for CPU-intensive tasks. The TS-451U’s fast encryption and decryption performance provides transfer speeds of up to 128 MB/s with AES-256 bit volume encryption, boosting system performance & security while ensuring the safety of sensitive data stored in the TS-451U.

    Test Environment:
    – OS: QTS 4.1.2
    – Volume type: RAID 5; 4 x Seagate ST1000NM0033
    – Network environment: direct connection between NAS and PC, 1GbE LAN (MTU 1500);

    Client PCs:
    – Intel(R) Core(TM) i7-4770 3.40GHz CPU; DDR3 1600Hz 16GB; Seagate ST500DM002; Intel Gigabit CT (MTU 1500); Windows® 7 Professional 64bit SP1
    – IOMeter configuration:Transferring 8GB file continuously to/from 2 PCs for 3 minutes. Block size: 64KB for SMB2.0 (Throughput)

    QTS – Simple and efficient

    Thanks to the intuitive user interface of QTS, system operations of the TS-451U are smooth and handy. Its intelligent desktop allows you to find desired functions quickly, create desktop shortcuts or group shortcuts, monitor important system information on a real-time basis, and open multiple application windows to run multiple tasks concurrently, bringing greater operating efficiency.

    Qsirch – A smarter, faster way to search

    Quickly and easily find documents, photos, videos, and music with Qsirch, QNAP’s new built-in NAS search application lets you find what you need by real-time, natural search. Simply type in as much as you know about what you are trying to find, including bits of the file name or even words/phrases in the document, and Qsirch will display a list of matches, complete with thumbnails, as you type. Qsirch even remembers your search history so you can quickly navigate to files you’ve previously searched for. Qsirch is a huge productivity boost – it greatly reduces the amount of time spent looking for files on the NAS so you can focus on other tasks.

    Note: 2GB RAM (4GB or more RAM is recommended for optimum performance) and QTS 4.1 or newer firmware is required.

    SSD cache acceleration

    The TS-451U supports SSD caching which can greatly boost IOPS performance of storage volumes. It is perfect for improving overall workflow of IOPS-demanding applications such as virtualization.

    Economical storage expansion with scale-up solution

    The TS-451U offers a high performance yet affordable storage solution to fulfill the needs of business in archiving rapidly growing data & large files. The TS-451U supports capacity expansion by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on demand, making the TS-451U an ideal file center with a large storage capacity for business data.

    The maximum raw storage capacity available by connecting a QNAP expansion enclosure:

    Turbo NAS Model QNAP Expansion Enclosure No. of RAID Expansion Enclosure Total HDD No.
    (NAS + Enclosure)
    Max. Raw Capacity (TB)*
    TS-451U UX-1200U-RP 1 16 128
    UX-800U-RP 1 12 96

    *The maximum capacity is calculated by using 8TB HDDs.

    Monitor and manage multiple NAS with Q’center

    Q’center turns your TS-451U into a central management system to manage multiple Turbo NAS units. After installing Q’center in QTS App Center, you can use the TS-451U to centrally manage multi-site Turbo NAS for monitoring system logs and managing firmware update and maintenance, and enjoy major benefits including ease-of-use, cost-efficiency, convenience and flexibility. Managing multiple Turbo NAS becomes so easy and efficiently.

    Cross-platform file sharing, centralized data storage

    The TS-451U supports SMB/CIFS, NFS, and AFP protocols for file sharing across Windows, Mac, Linux/UNIX networks. Data, logs and ISO images of CDs and DVDs can be centrally stored on the TS-451U and protected by an integrated antivirus solution. The Windows AD and LDAP services enable system administrators to configure user permissions by using an existing Windows AD server, LDAP server or built-in LDAP service. The TS-451U supports SAMBA v4 and can act as a Windows domain controller to manage privilege settings.

    Well-rounded backup solutions to secure data

    QNAP NetBak Replicator supports real-time and scheduled data backup on Windows including Outlook email archiving. Apple Time Machine is also supported to provide Mac OS X users with a solution to effortlessly back up data to the TS-451U. The USB 2.0 port on the front panel of the TS-451U features a one-touch-copy function for you to instantly back up data from external drives to the TS-451U with just one click, or alternatively to back up data from the TS-451U to external drives. A wide range of third-party backup software such as Acronis® True Image and Symantec® Backup Exec are also supported.

    Disaster recovery solutions brings peace of mind

    The TS-451U offers various data recovery options. RTRR (Real-Time Remote Replication) supports real time or scheduled data backup to a remote Turbo NAS or FTP server and synchronizes files to a remote folder from a local folder with better backup efficiency and reduced backup time. The TS-451U also supports rsync protocol to back up data to another remote server on scheduled basis. Data can also be backed up to and restored from a range of cloud storage services, including Amazon® S3, Amazon Glacier, Microsoft® Azure, ElephantDrive®, Dropbox® and Google Cloud Storage.

    File synchronization across multiple devices

    The Qsync utility turns your TS-451U into a safe data center for file synchronization with a large storage capacity. Any file uploaded to the TS-451U will be made available for all linked devices, such as computers, laptops or mobile devices. Qsync is especially useful for frequent travelers to manage files and always have the most updated files on different devices. Qsync provides multiple ways of file synchronization and group file sharing, greatly enhancing the flexibility of collaboration.

    Comprehensive security options

    In open network environments, business data may be exposed in a potential hack. The TS-451U provides numerous security options, such as encrypted access, IP blocking, and more. IT administrators can also control the access rights of each user to different folders, preventing unauthorized access to important files. The TS-451U is validated with military-level FIPS 140-2 AES 256-bit encryption, preventing sensitive business data from unauthorized access and breach even if the hard drives or the entire system were stolen.

    Run additional operating systems on the TS-451U

    With the support for Intel® Virtualization Technology (VT-x), the TS-451U can operate the Virtualization Station, transforming the TS-451U into a 2-in-a-box NAS that can function as an all-in-one NAS and a virtualization platform that supports multiple operating systems, fast virtual machine (VM) creation, VM import/export, snapshot, and enables desktop operations on web browsers. With the easy-to-use interface, you can centrally manage all of the VMs created on the TS-451U with minimal effort. You can also download VMs on demand from online VM markets and import them to the TS-451U without any complex procedures.

    Note: 2GB or more of RAM is required

    Comprehensive surveillance solution providing 24/7 security

    Surveillance Station is professional network surveillance Video Management System (VMS) that offers a user-friendly management interface, over 2,700 compatible IP camera models, and expandable IP camera channel licenses. It supports real-time monitoring, video & audio recording and playback with a wide range of customizable settings. You can also install the Vmobile mobile app on your iOS® or Android™ devices to manage the monitored channels anytime and anywhere to safeguard your office environment, or install the Vcam mobile app to turn your device into a network camera to instantly record to your TS-451U. The TS-451U offers 2 free IP camera channels and you can expand up to 32 channels by purchasing additional licenses.

    Signage Station – Creatively present your animated content and ads

    With the Signage Station, it is easy to create content for a wide range of materials such as menu boards, advertisements, posters, and business profiles. The Signage Station is a great tool to invigorate your advertisements or animated materials for promoting your services, and to update contents in a timely manner. The iArtist Lite application, with intuitive editing tools, helps you create these signs with simple drag & drop tools. Your creativity can now travel around the world with a few simple steps to instantly get published, revised, and shared.

    Access, use, sync and enjoy with your tablets and smartphones

    The TS-451U is your private cloud storage that virtually enlarges the capacity of your mobile devices. Qfile allows you to access, upload, download, manage, and share stored files easily as if you are carrying tons of files in your pocket. If Qfile is installed on an iOS device, users can also browse videos & photos stored on the TS-451U and play via Apple TV. Qmanager lets you monitor & manage the TS-451U remotely and efficiently without turning on a PC; Qmusic allows you to listen to your music collections on the TS-451U anytime and anywhere, and download to enjoy offline; Qphoto & Qvideo make it easy for you to browse and share the photos or videos on the go.

    Install-on-demand apps to extend NAS functionality

    The TS-451U has a built-in App Center that provides various install-on-demand apps developed by QNAP and third-party developers, including tools for backup/sync, business, content management, communications, download, entertainment, and much more. It is also a centralized location for managing & updating installed apps. In addition, QNAP’s development platform embraces the open-source spirit to enable developers to create their own apps, adding potentially limitless potential for the TS-451U.


    The TS-451U utilizes a 22nm CPU and DDR3L RAM which feature low voltage requirements and low power consumption whilst maintaining high performance in system operations. Other eco-friendly designs include scheduled power on/off, hard disk standby mode, and Wake on LAN.

    Easy-to-use NAS management tools

    The TS-451U provides comprehensive system tools to increase management efficiency.

    Administrators can turn on the Turbo NAS via LAN to save energy and improve security.

    The Turbo NAS supports Syslog server that collects logs from various connected devices over the Internet and saves the data, enabling centralized log management with greater efficiency.

    Additional features

    The TS-451U supports various applications for home offices as an all-in-one Turbo NAS with cost-efficiency.

    The Turbo NAS supports FTP server to share large size files, coming with user-defined settings including bandwidth limitation, number of connections, and write-only permission.

    The Turbo NAS supports VPN server which provides an easy way for IT administrators to build up a secure private network and allows the staff to log on from outside the office and access business resources securely such as files and Internet connections..

    Hardware Specifications

    Processor Dual-core Intel® Celeron® 2.41GHz (up to 2.58GHz)
    Memory Installed: 1GB DDR3L SDRAM (1 x 1GB)
    Slots: 2 SODIMM (Max: 8GB)
    NOTE: 1. When installing two memory modules, please ensure that they are the same size and ideally use the same type of RAM for both memory slots.
    2. For the information of RAM module installation and compatible NAS models, please refer to the QNAP RAM Module Installation Guide.
    Flash memory 512MB
    Internal drive 4 x 3.5” or 2.5” SATA 6Gb/s, SATA 3Gb/s HDD or SSD
    1. The system is shipped without HDD.
    2. HDD compatibility list
    Drive tray 4 Hot-swappable and lockable trays
    Network interface 2 RJ45 Gigabit Ethernet ports
    Ports 4 x USB 3.0 (rear)
    1 x USB 2.0 (front)
    1 x HDMI
    1 x console (system maintenance)
    LED indicators Status, LAN, USB, HDD 1, HDD 2, HDD3, HDD4
    Buttons Power, USB One-Touch-Copy, reset
    Alarm Buzzer System warning
    Form Factor 1U, rack mountable
    Dimensions 44 (H) x 439 (W) x 499 (D) mm
    1.73 (H) x 17.28 (W) x 19.65 (D) inch
    Weight Net weight: 7.63 kg (16.82 lbs)
    Gross weight: 11.60 kg (25.57 lbs)
    Power consumption (W) HDD standby: 21.03W
    In operation: 38.01W
    (with 4 x 2TB HDD installed)
    Sound Level* Sound pressure (LpAm) :38.4 dB(A)
    Temperature 0-40˚C
    Humidity 0~95% R.H.
    Power Supply Input: 100-240V AC, 50/60Hz; Output: 250W
    Fan 2 x quiet cooling fan (4 cm, 12V DC)
    1. USB 3.0 x 1 6. USB 3.0 Port x 4
    2. LED Indicators:
    Status, LAN, USB, HDD 1, HDD 2, HDD3, HDD4
    7. Gigabit LAN x 2
    3. Power Button 8. HDMI
    4. Console port (for maintenance only) 9. Power Connector
    5. Password & Network Settings Reset Button

    * Testing Environment:
    Refer to ISO 7779 ; Maximum HDD loaded ; Bystander Position ; Average data from 1 meter in front of operating NAS

    Software Specifications

    Operating System
    QTS 4.1 (embedded Linux)
    Storage Management
    1. QNAP flexible Volume/LUN with thin provisioning and space reclaim
    2. RAID 0,1, 5, 6, 10, 5+spare
    3. Global hot spare
    4. Supports storage pool
    5. Online volume expansion
    6. Online storage pool expansion
    7. Online RAID capacity expansion and online RAID level migration
    8. Storage expansion via a QNAP UX-1200U-RP/UX-800U-RP expansion unit
    9. Bad block scan and hard drive S.M.A.R.T.
    10. Bad block recovery
    11. RAID recovery
    12. Bitmap support
    Supported Client OS
    1. Windows XP, Vista, Windows 7 (32/64-bit), Windows 8 (32/64-bit), Windows Server 2003, 2008 R2, 2012, 2012 R2
    2. Apple Mac OS X
    3. Linux & UNIX
    Power Management
    1. Wake on LAN
    2. Internal hard drive standby mode
    3. Scheduled power on/off
    4. Automatic power on after power recovery
    5. USB and network UPS support with SNMP management
    Supported Browsers
    1. Microsoft Internet Explorer 10+
    2. Mozilla Firefox 8+
    3. Apple Safari 4+
    4. Google Chrome
    Access Right Management
    1. Batch users creation
    2. Import/Export users
    3. User quota management
    4. Local user access control for CIFS, AFP, FTP, and WebDAV
    5. Application access control for Photo Station, Music Station, Video Station, and File Station
    6. Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
    Multilingual Support
    1. Chinese (Traditional & Simplified), Czech, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Spanish, Swedish, Thai, Turkish
    Domain Authentication Integration
    1. Microsoft Active Directory (AD) & Domain Controller support
    2. LDAP server, LDAP client
    3. Domain users login via CIFS/SMB, AFP, FTP, and File Station
    File System
    1. Internal drive: EXT4
    2. External drive: EXT3, EXT4, NTFS, FAT32, HFS+
    myQNAPcloud Service
    1. Private cloud storage and sharing
    2. Free host name registration (DDNS)
    3. Auto router configuration (via UPnP)
    4. Web-based file manager with HTTPS 2048-bit encryption
    5. CloudLink for remote access without complicated router setup
    6. myQNAPcloud connect for easy VPN connection (Windows VPN utility)
    1. TCP/IP (IPv4 & IPv6: Dual Stack)
      – Not all services support IPv6
    2. Jumbo frame support
    3. Proxy server (Squid package available in App Center)
    4. Proxy client
    5. DHCP client, DHCP server
    6. Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
    7. UPnP & Bonjour discovery
    8. USB Wi-Fi 802.11ac/a/n adapter support
    1. Syncs files among multiple devices with SSL support
    2. Selective synchronization for syncing specific folders only
    3. Use team folders as a file center for greater team collaboration (maximum sync tasks: 32)
    4. Shares files by links via email
    5. Policy settings for conflicted files and file type filter support
    6. Version control: up to 64 versions.
    7. Incremental synchronization for HDD space saving
    8. Supports Windows & Mac OS
    1. Network access protection with auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
    2. CIFS host access control for shared folders
    3. FIPS 140-2 validated AES 256-bit volume-based data encryption*
    4. AES 256-bit external drive encryption*
    5. Importable SSL certificates
    6. Instant alert via email, SMS, beep

    * The data encryption functions may not be available in accordance to the legislative restrictions of some countries (ex. Russia, Belarus, Ukraine, Kazakhstan and Uzbekistan.)

    Web Administration
    1. Smart toolbar and dashboard for neat system status display
    2. Smart fan Control
    3. Dynamic DNS (DDNS)
    4. SNMP (v2 & v3)
    5. Resource monitor
    6. Network recycle bin for file deletion via CIFS/SMB, AFP, and File Station
      – Automatic Cleanup
      – File Type Filter
    7. Comprehensive logs (events & connection)
    8. Syslog client/server
    9. System settings backup and restore
    10. Restore to factory default
    11. Mobile app: Qmanager for remote system monitoring & management

    Powerful All-in-one server

    File Server
    1. File sharing across Windows, Mac, and Linux/UNIX
    2. Windows ACL
    3. Advanced folder permission for CIFS/SMB, AFP, FTP
    4. Shared folder aggregation (CIFS/SMB)
    iSCSI (IP SAN)
    1. iSCSI target with multi-LUNs per target (Up to 256 targets/LUNs combined)
    2. Support for LUN mapping & masking
    3. Online LUN capacity expansion
    4. Support for SPC-3 persistent reservation
    5. Support for MPIO & MC/S
    6. iSCSI LUN backup, one-time snapshot, and restoration
    7. iSCSI connection and management by QNAP Windows Qfinder Pro
    8. Virtual disk drive (via iSCSI initiator)
    9. Stack chaining master
    10. Max No. of virtual disk drives: 8


    FTP Server
    1. FTP over SSL/TLS (Explicit)
    2. FXP supported
    3. Passive ftp port range control
    Surveillance Station
    1. Supports over 2,700 IP cameras
    2. Includes 2 free camera licenses, up to 32 camera channels via additional license purchase
    3. Instant playback to check recent events
    4. Online editing to change cameras when in live view
    5. Visual aid by using e-maps
    6. Playback and speed control by shuttle bar
    7. Video preview using playback timeline
    8. Intelligent Video Analytics (IVA) for advanced video search
    9. Surveillance client for Mac
    10. Mobile surveillance app: Vmobile (iOS and Android)
    11. Mobile recording app: Vcam (iOS and Android)
    File Station
    1. Supports ISO Mounting (Up to 256 ISO Files)
    2. Supports thumbnail display of multimedia files
    3. Supports sharing download links and upload links
    4. Drag-n-drop Files via Google Chrome and Mozilla Firefox
    5. File Compression (ZIP or 7z)
    6. Creation of and sending download links for sharing public files with expiration time and password protection
    7. Support for displaying subtitles (*.SRT, UTF-8 format)
      – Support slideshow playback in media viewer
    8. Mobile App: Qfile for file browsing and management
    VPN Server
    1. Secure remote access: PPTP & OpenVPN VPN services
    2. Max number of clients: 30
    HD (HybridDesk) Station
    1. Playback videos, music, photos on your TV with Kodi via HDMI output
    2. Watch various online contents such as Flickr, Picasa, Shoutcast, and more.
    3. Web browser (Chrome, Firefox)
    4. Supports USB U.S. keyboard and mouse
    5. Supports QNAP Qremote app and the official Kodi remote app
    6. Supports user login permissions

    – The playback and quality of some video files may be affected due to the CPU and GPU decoding abilities.
    – Up to 7.1 channel audio passthrough is supported

    VPN Client
    1. Supported VPN protocols: PPTP & OpenVPN services
    2. PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2
    3. PPTP Encryption: None, AES 40/128 bit, AES 256 bit
    4. OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit
    5. Transmission package monitor
    6. OpenVPN port control
    7. OpenVPN link compression
    Backup Station
    1. Remote replication server (over rsync)
    2. Real-time remote replication (RTRR) to another QNAP NAS or FTP server
    3. Works as both RTRR server & client with bandwidth control
    4. Real-time & scheduled backup
    5. Encryption, compression, file filters, and transfer rate limitations
    6. Encrypted replication between QNAP NAS servers
    7. Desktop backup with QNAP NetBak Replicator for Windows
    8. Apple Time Machine backup support
    9. Data backup to multiple external storage devices
    10. Synchronizes with cloud storage: Amazon S3, ElephantDrive, Dropbox*, and Google Cloud Storage
    11. Third party backup software support: Veeam backup & replication, Acronis True Image, Arcserve backup, emc retrospect, Symantec Backup Exec, etc.


    DLNA Server
    1. Supports DLNA/UPnP TVs and Players such as PlayStation 3 and Xbox 360
    2. Support CUE indexing files for APE, FLAC audio format.
    Print Server
    1. Max. number of printers: 3
    2. Support for Internet Printing Protocol
    3. Print job display and management
    4. IP-based and domain name-based privilege control
    App Center
    1. Over 100 official and community software add-ons (including Dropbox, Google Cloud Storage Sync, McAfee, WordPress, HappyGet II, and more.)
    2. Photo Station, Music Station, Video Station, Download Station, Notes Station, Signage Station
    Cloud Backup Station
    1. Amazon S3
    2. Amazon Glacier
    3. WebDAV-based cloud storage
    4. Microsoft Azure
    5. Open Stack
    Storage Plug & Connect
    1. Creating and mapping shared folders usingQNAP Windows Qfinder Pro
    2. Creation of and connection to iSCSI targets/LUN

    Designs and specifications are subject to change without notice.