First home/SOHO Intel dual-core NAS with a PCIe slot for extending NAS functionality
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.
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.
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), 2GB/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 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.)
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.
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.
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@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.
*The TS-251B’s hardware provides H.264 hardware decoding, encoding and transcoding capabilities. However, playback quality may vary due to
factors including playback software, file formats, system usage, and available bandwidth.
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.
Consolidates system logs and notifications for all NAS apps into a single app with flexible rule settings, facilitating smooth and easy NAS management.
Checks for weaknesses and offers recommendations to enhance NAS security. Anti-virus and anti-malware software is also integrated within
Security Counselor to ensure the complete protection of your NAS and data.
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.
OCR Converter extracts text from images, helping to boost productivity and making it easier to find files.
Qfiling automates file organization. Files are automatically archived into folders based on your settings.
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.
compatible IP cameras
free IP camera channels
max. IP camera channels
record from USB webcams
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.
Virtualization Station allows you to run multiple Windows®, Linux®, UNIX® and Android™ virtual machines on the TS-251B. You can use Virtual Network Computing
(VNC) through a browser to operate the virtual machines. Virtualization Station is ideal for organizations to run multiple applications on a single NAS.
Container Station integrates LXC and Docker® lightweight virtualization technologies. You can download apps from the built-in Docker Hub® to easily import/export
container apps and manage access controls, enjoying the benefits of easy installation, transferability and high-efficiency.
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.
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 or 4-bay TR-004 USB hardware RAID external enclosures* and use the Storage & Snapshots Manager to easily handle NAS capacity expansion.
*TR-002 and TR-004 will be available soon.