The TS-251A provides the innovative USB 3.0 QuickAccess port that allows you to quickly complete the first-time NAS installation and to then directly access files and data stored on the NAS. It also supports two additional transmission modes: Ethernet NAS mode and iSCSI SAN block-based mode. Combining USB QuickAccess, NAS and iSCSI-SAN into one box, the TS-251A is a powerful but easy-to-use storage solution ideal for backup, synchronization, remote access, and entertainment. It greatly helps to boost productivity and can meet the demands of photographers and audiovisual enthusiasts for direct, quick access to files. The TS-251A is powered by an upgradable and high-performance 14nm Intel Celeron N3060 dual-core 1.6GHz processor, and supports 4K video playback and transcoding.
Excellent system performance, ideal for centralized management, file sharing and backup
USB QuickAccess port for accessing files without needing a network connection
Supports 4K hardware decoding and transcodes 4K H.264 videos on-the-fly or offline
Enjoy the best audio-visual experience with HDMI output and the free remote control
Build a personal karaoke system with OceanKTV
Linux Station supports Ubuntu® with direct output via HDMI
A hybrid approach to virtualization: Virtualization Station & Container Station
Supports Virtual JBOD (VJBOD) to maximize the storage utilization of multiple QNAP NAS units
14nm Intel® Celeron® N3060 dual-core CPU and hardware-accelerated encryption engine
The TS-251A is powered by an advanced 14nm Intel® Celeron® dual-core 1.6GHz processor that features low TDP (only 6 watts) and can automatically burst up to 2.48GHz. Coupled with dual-channel 2/4GB DDR3L-1600 dual-channel RAM (upgradable to 8GB), dual Gigabit LAN ports, and SATA 6Gb/s, the TS-251A can deliver up to 211.88 MB/s throughput for optimizing mission-critical tasks while still being energy efficient. The TS-251A also features Intel® AES-NI hardware-accelerated encryption to deliver up to 209.13 MB/s throughput with AES 256-bit throughput with AES-NI encryption for both full NAS volume and shared folders, boosting system performance & security while ensuring the safety of sensitive business data stored in the NAS.
Direct access to files with the USB QuickAccess port
The TS-251A features an innovative USB QuickAccess port that allows you to complete the first-time installation and setup of your TS-251A without requiring network connectivity. The files and data stored on the TS-251A can also be directly accessed by using Qfinder Pro* and a USB 3.0 A-Male to Micro B-Male cable or a USB 2.0 Micro B cable**. Furthermore, you can assign access rights to users for different folders to prevent unauthorized access to important files.
USB QuickAccess/NAS/iSCSI SAN triple solution
The TS-251A innovatively re-defines what NAS can do by providing a USB QuickAccess/NAS/iSCSI SAN triple solution. It discards the restriction of conventional DAS that only allows connecting to one device, and breaks the cost barrier for a high-speed Ethernet solution. The TS-251A’s three data transmission modes not only work independently, but they also can simultaneously run with no bandwidth interference, allowing you to multi-task with utmost productivity.
USB QuickAccess Mode
You can instantly access files and data stored on the TS-251A by connecting a PC/Mac to its USB QuickAccess port and by using the Qfinder Pro application. To balance security and convenience needs, this method provides three access authentication modes. These settings can be easily configured in Network and Virtual Switch in the QTS management interface:
“All NAS Users” (default): A NAS username and password are required to use QuickAccess to access data stored on the NAS.
“Everyone”: Allows everyone to access data stored on the NAS using QuickAccess with no username or password required.
“Selected Users and Groups”: Only authorized users/groups can use QuickAccess to access data stored on the NAS (a username or password is also required).
The TS-251A’s USB mode is helpful for users that handle large volumes of media files on a daily basis. It provides an extremely convenient and fast solution for users to store and backup data on their computers or to access data on their NAS. With the USB mode the TS-251A is plug and use without compromising convenience or safety.
Ethernet NAS mode
The TS-251A features Ethernet networking for flexible and simultaneous file sharing across multiple devices, using SMB/CIFS, NFS and AFP protocols for sharing across Windows, Mac and Linux/UNIX networks. Use Qfinder Pro to find the TS-251A's Ethernet IP address to connect to it.
iSCSI SAN block-based mode
The TS-251A supports iSCSI SAN. After creating an iSCSI target on the TS-251A, you can access the iSCSI with your computer* using the NAS IP.
Superior 4K video transcoding
Featuring advanced 8th-generation Intel® HD Graphics, the TS-251A supports 4K H.264 hardware decoding and delivers superior real-time 4K and 1080p video transcoding to convert videos to universal formats that can be smoothly played on PCs, mobile devices and Smart TVs*. With offline transcoding, even when you can only connect using a low-speed Internet connection, you can still enjoy smooth video playback via File Station, Video Station, and the Qfile mobile app by selecting a pre-rendered lower resolution video. The TS-251A also allows you to set a dedicated folder for automatic video transcoding.
Enjoy media freely with multi-zone multimedia controls
Use a TS-251A as a multi-zone multimedia system to fill every corner of your house with your choice of media. You can centrally manage and stream photos, music and videos stored on the TS-251A to HDMI, DLNA®, Apple TV®, Chromecast™* , Roku®, Amazon® Fire TV or to the devices connected to the TS-251A (music streaming only) through Bluetooth® & USB. With Plex Media Server, the TS-251A is transformed into a powerful streaming machine.
Enjoy an exclusive karaoke experience with OceanKTV
OceanKTV is the first NAS-based karaoke application and allows you to create a quality karaoke experience at home or in the office. The TS-251A offers high-capacity storage for accommodating up to thousands of 1080p karaoke songs. The TS-251A comes with a 3.5 mm microphone jack and can transmit audio to your amplifier using HDMI or the 3.5 mm Line out port. Simply attach an HDMI display to the TS-251A and start singing with OceanKTV. The experience can be managed using the OceanKTV app in QTS or by using the OceanKTV mobile app on your phone or tablet. More than a NAS, the TS-251A is a karaoke machine for singing entertainment. Enjoy alone or with your friends!
QTS – Simple and powerful
Thanks to the intuitive user interface of QTS, your NAS experience is smarter, smoother and spectacular. Its modern flat design streamlines loading times, and the 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 working efficiency. QTS breaks the barriers of devices, platforms, and geography to bring optimized cloud experiences and incorporates advanced features including volume/LUN snapshots, remote connections to public cloud services in File Station, multi-zone multimedia system, and more.
File synchronization across devices and clouds
Qsync turns your TS-251A into a safe, large-capacity data center for file synchronization. Any file uploaded to the TS-251A 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 up-to-date files on different devices. Qsync provides multiple ways of file synchronization and group file sharing, greatly enhancing the flexibility of team projects and collaboration. It also supports centralized configuration, and allows you to remotely erase the Qsync folder on a lost device to avoid data breaches, and even restore it after you have retrieved the device.
Cross-platform file sharing, centralized data storage
The TS-251A 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-251A 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 the built-in LDAP service.
Centralize backup, restoration and synchronization with Hybrid Backup Sync
Hybrid Backup Sync consolidates backup, restoration and synchronization functions into a single QTS application for you to easily transfer your data to local or remote QNAP NAS, to remote servers and to cloud storage spaces as a comprehensive data storage and disaster recovery plan. You can synchronize files between the TS-251A and cloud storage in real time - including Amazon® Drive, Google Drive™, Dropbox®, Microsoft OneDrive®, Yandex® Disk, and Box®, and back up files to Amazon® S3, Amazon® Glacier, Microsoft® Azure™, Google Cloud Storage™, OpenStack Swift and WebDAV cloud services. Hybrid Backup Sync can detect sparse files to avoid backing up unnecessary data, and supports file compression to save storage space. There are flexible settings for concurrent file processing and multi-threaded data transfer by splitting large files into smaller parts, greatly increasing the file transfer rate for greater work efficiency.
Restore files with Snapshot for Volume & LUN
QTS Storage Manager features an easy-to-use web-based snapshot tool to easily backup and restore data on the TS-251A back to any point of time in the event of data loss. You can take snapshots for volumes and LUN (up to 64 snapshots per volume/LUN and maximum 256 snapshots per NAS), efficiently replicate volume/LUN snapshots via Snapshot Replica to remote servers by copying only the changes made, and quickly clone a volume /LUN snapshot as a local volume without interrupting current system operations. You can even set up the system to automatically take a snapshot of the volume before backup via RTRR/rsync, even if files are opened.
Qsirch - a smarter, faster way to search
The TS-251A supports Qsirch, a proprietary search engine for quick file searching. In addition to previewing thumbnails, content abstract and keyword hints, Qsirch allows you to search through all of the .eml files stored on the TS-251A and use customized search criteria* such as date, size, sender and recipient. Qsirch even remembers your search history allowing you to quickly navigate to files you've previously searched for. You can also use the Google Chrome™ extension - Qsirch Helper - to search for files on your NAS when using Google Search™. Qsirch is a huge productivity boost that greatly reduces the time spent looking for files on the NAS, allowing you to focus on other tasks.
QmailAgent: a mailroom center for your private cloud
QmailAgent is an online email client that helps you manage multiple email accounts, allowing you to access all of your emails and to easily switch between different accounts. It provides complete functionality for composing, reading and organizing emails. You can even attach files, photos and documents from the TS-251A when composing emails. QmailAgent also allows iOS® and Android™ users to quickly check multiple email accounts with mobile devices, and to browse & send emails using the QmailAgent on their TS-251A. You can also use QmailAgent together with Qsirch, which supports powerful email search functions to search through all of the .eml files stored on the TS-251A to make managing and searching through massive quantities of emails much easier.
QTS-Linux dual systems for IoT applications
The TS-251A’s QTS-Linux dual systems are based on QNAP’s advanced virtualization technologies. The revolutionary architecture of the TS-251A enables users to not only to enjoy the extraordinary QTS operating system and download rich apps from QTS App Center but also to develop or utilize IoT packages for Linux®. The TS-251A supports Ubuntu and allows users to develop and install various IoT packages on demand and centrally store the data on the TS-251A, providing a secure private storage and IoT development solution. Simply plug in a keyboard, mouse and HDMI monitor to the TS-251A, and use the Linux Station as if you were using a PC*. You can also operate Ubuntu in Linux Station as a remote desktop via web browser for instant management**.
Storage for hosting virtual machines and containerized applications
Virtualization Station allows you to host virtual machines (VM) on the TS-251A and access them via a web browser or VNC. Virtualization Station supports multiple operating systems, fast VM creation, VM backup & restoration, VM import/export, snapshot, and Device Management for centrally managing VM. Virtualization Station allows the TS-251A and VMs to share the same LAN port. No longer constrained by physical network performance, high-speed Virtual Switches greatly increases data transfer between VMs as well as between VMs and NAS through the internal interface. You can also download VMs on demand from online VM markets and import them to the TS-251A without any complex procedures.
The TS-251A also features the game-changing container technology for server virtualization with Container Station. It exclusively integrates LXC and Docker® lightweight virtualization technologies, allowing you to operate multiple isolated Linux® systems on the TS-251A as well as download apps from the built-in Docker Hub Registry®. Container Station now also provides the QIoT Containers platform to help you quickly structure your IoT environment and deployment in your private cloud.
Comprehensive surveillance solution providing 24/7 security
Surveillance Station is a professional network surveillance Video Management System (VMS) that offers a user-friendly management interface, over 3,000 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 app on your iOS® or Android™ devices to manage 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-251A. The TS-251A includes 2 free IP camera channels and you can expand up to 32 channels by purchasing additional licenses.
Use NAS to expand NAS capacity with Virtual JBOD
Besides using physical storage expansion enclosures, there is an additional option to expand NAS storage capacity. QNAP VJBOD (Virtual JBOD) is network-based JBOD that allows you to expand the storage of a QNAP NAS by using unused storage from other QNAP NAS units. You can mount this storage space to the TS-251A as virtual disks and create virtual storage pools and volumes for NAS functions such as creating and reverting snapshots, indexing multimedia files into the media library, and even creating iSCSI LUNs. VJBOD supports 10GbE/40GbE connections and port trunking (link aggregation with multiple LAN ports) that increase the performance and reliability of your VJBOD storage.
Connect a QNAP expansion enclosure to expand storage capacity easily
The TS-251A supports online capacity expansion for archiving rapidly-growing data by connecting a QNAP expansion enclosure. With the QNAP scale-up solution, the raw storage capacity can be expanded on demand, making the TS-251A an ideal file center with large storage capacity, especially useful for data-intensive applications.
With the support of QJBOD Express (JBOD enclosures roaming)*, you can just connect a large capacity QNAP expansion enclosure to the TS-251A, and migrate data to another NAS through the JBOD enclosure without needing a network connection.
Helpdesk: Submit technical support request and get help quickly
If you encounter technical problems or have suggestions for improving our products you can directly contact our support staff using the Helpdesk app. This app allows you to directly send feedback, questions, and technical support requests to our support team. Helpdesk features remote support, allowing our support team to help you quickly resolve issues by remotely connecting to your NAS over a secure 256-bit SSL encrypted connection. Helpdesk also provides a range of online resources, including online tutorials, frequently-asked questions, compatibility lists and the QNAP Helpdesk Knowledgebase. Whether you are a new or experienced NAS user, you can quickly find answers to your questions by browsing through these resources.
Supported storage drive interfaces: Serial ATA III
Storage drive sizes supported: 2.53.5
RAID support: Y
RAID levels: 0 1 JBOD
Hot-swap drive bays: Y
Supported file systems: FAT32HFSNTFSext3ext4
Storage drives installed: N
Installed storage drive type: N
Supported storage drive types: HDDSSD
Number of storage drives supported: 2
Processor model: N3060
Processor frequency: 1.6 GHz
Processor cores: 2
Processor family: Intel Celeron
CPU configuration max: 1
ECC supported by processor: N
Integrated 4G WiMAX: N
PCI Express configurations: 1x22x11x42x24x1
PCI Express slots version: 2.0
Processor boost frequency: 2.48 GHz
Processor cache: 2 MB
Processor cache type: L2
Processor code: SR2KN
Processor codename: Braswell
Processor lithography: 14 nm
Processor operating modes: 64-bit
Processor package size: 25 x 27 mm
Processor series: Intel Celeron N3000 series
Processor socket: BGA 1170
Processor threads: 2
Scenario Design Power SDP: 4 W
System bus rate: 5 GTs
Tjunction: 90 C
Thermal Design Power TDP: 6 W
Maximum internal memory supported by processor: 8 GB
Conflict Free processor: Y
Processor ARK ID: 91832
Internal memory type: DDR3L
Maximum RAM supported: 8 GB
Memory slots: 2 x SO-DIMM
Internal memory: 2 GB
Flash memory: 4096 MB
Ethernet LAN: Y
Ethernet LAN data rates: 101001000 Mbits
DHCP client: Y
DHCP server: Y
Jumbo frames support: Y
iSCSI support: Y
Wake-on-LAN ready: Y
Supported network protocols: CIFSSMB AFP v3.3 NFSv3 FTP FTPS SFTP TFTP HTTPS Telnet SSH iSCSI SNMP SMTP and SMSC
Link aggregation: Y
Ports & interfaces
USB 3.0 3.1 Gen 1 Type-A ports quantity: 3
HDMI ports quantity: 1
Ethernet LAN RJ-45 ports: 2
On-board graphics adapter model: Intel HD Graphics 400
On-board graphics adapter base frequency: 320 MHz
On-board graphics adapter burst frequency: 600 MHz
On-board graphics adapter DirectX version: 12.0
Maximum on-board graphics adapter memory: 8 GB
Number of displays supported on-board graphics: 3
Chassis type: Tower
Cooling type: Active
Product colour: GreenWhite
Number of fans: 1 fans
Fan diameter: 7 cm
LED indicators: PowerReadyReset
Cable lock slot: Y
Cable lock slot type: Kensington
Device class: Home Home Office
Backup function: Y
Backup features: CloudiSCSI LUN
Multilingual support: Y
Noise level: 18.3 dB
Card reader integrated: Y
Compatible memory cards: SD
Security algorithms: 256-bit AESFIPS 140-2HTTPSSSHSSLTLS
Access Control List ACL: Y
Web-based management: Y
Reset button: Y
Onoff switch: Y
Built-in UPnP AV media server: Y
Built-in iTunes server: Y
Built-in FTP server: Y
Browser supported: Microsoft Internet Explorer 10 Mozilla Firefox 8 Apple Safari 4 Google Chrome
System log: Y
Hot spare: Y
S.M.A.R.T. support: Y
Share folder: CIFSSMB
Share folder access right management: Y
Operating system installed: QNAP Turbo System
Operating system version: 4.2
Windows operating systems supported: Windows 10 EducationWindows 10 Education x64Windows 10 EnterpriseWindows 10 Enterprise x64Windows 10 HomeWindows 10 Home x64Windows 10 ProWindows 10 Pro x64Windows 7 EnterpriseWindows 7 Enterprise x64Windows 7 Home BasicWindows 7 Home Basic x64Windows 7 Home PremiumWindows 7 Home Premium x64Windows 7 ProfessionalWindows 7 Professional x64Windows 7 StarterWindows 7 Starter x64Windows 7 UltimateWindows 7 Ultimate x64Windows 8Windows 8 EnterpriseWindows 8 Enterprise x64Windows 8 ProWindows 8 Pro x64Windows 8 x64Windows 8.1Windows 8.1 EnterpriseWindows 8.1 Enterprise x64Windows 8.1 ProWindows 8.1 Pro x64Windows 8.1 x64
Linux operating systems supported: Y
Mac operating systems supported: Mac OS X 10.0 CheetahMac OS X 10.1 PumaMac OS X 10.10 YosemiteMac OS X 10.11 El CapitanMac OS X 10.2 JaguarMac OS X 10.4 TigerMac OS X 10.5 LeopardMac OS X 10.6 Snow LeopardMac OS X 10.7 LionMac OS X 10.8 Mountain LionMac OS X 10.9 Mavericks
Server operating systems supported: Windows Server 2003Windows Server 2003 R2Windows Server 2003 x64Windows Server 2008Windows Server 2008 R2Windows Server 2008 R2 x64Windows Server 2008 x64Windows Server 2012Windows Server 2012 R2
Power supply location: External
Power supply unit PSU capacity: 65 W
Number of power supply units: 1
Power consumption typical: 16.2 W
Power consumption sleep: 7.9 W
Power consumption off: 0.72 W
AC input voltage: 100-240 V
Fan voltage: 12 V
Weight & dimensions
Width: 102 mm
Depth: 219 mm
Height: 169 mm
Weight: 1.28 kg
Package weight: 2.64 kg
Processor special features
Embedded options available: Y
Enhanced Intel SpeedStep Technology: Y
Execute Disable Bit: Y
Idle States: Y
Intel 64: Y
Intel Clear Video Technology: Y
Intel Enhanced Halt State: Y
Intel Rapid Storage Technology: N
Intel Secure Boot: Y
Intel Smart Connect Technology: N
Intel Stable Image Platform Program SIPP: N
Intel Trusted Execution Technology: N
Intel Virtualization Technology VT-x: Y
Intel Virtualization Technology for Directed IO VT-d: N
Intel VT-x with Extended Page Tables EPT: Y
Intel AES New Instructions Intel AES-NI: Y
Intel Anti-Theft Technology Intel AT: N
Intel Clear Video HD Technology Intel CVT HD: Y
Intel Clear Video Technology for Mobile Internet Devices Intel CVT for MID: Y
Intel High Definition Audio Intel HD Audio: Y
Intel Hyper Threading Technology Intel HT Technology: N
Intel Identity Protection Technology Intel IPT: Y
Intel Insider: N
Intel InTru 3D Technology: N
Intel OS Guard: N
Intel Quick Sync Video Technology: Y
Intel Secure Key: Y
Intel Small Business Advantage Intel SBA: N
Intel Smart Response Technology: N
Intel Turbo Boost Technology: N
Intel vPro Technology: N
Intel Wireless Display Intel WiDi: Y
Maximum number of PCI Express lanes: 4
Number of execution units: 12
Thermal Monitoring Technologies: Y
Home Networking by Intel: Y
Memory channels supported by processor: Dual
Memory types supported by processor: DDR3L-SDRAM
External power adapter: Y
Cables included: ACLAN RJ-45
Quick installation guide: Y
Number of screws: 14
Operating temperature T-T: 0 - 40 C
Operating relative humidity H-H: 5 - 95
Digital Living Network Alliance DLNA certified: Y
Power management: Y