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Review Summary
Accidents happen. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failures, and more.
If we can’t fix it, we’ll replace it at no additional cost.
Protect your product from drops, spills, and more.
Enjoy your gear without fear. We have you covered!
When regular use of your product over time results in mechanical or electrical failure.
We will never charge you a deductible after the purchase of a plan.
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
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Intel Celeron J3355 dual-core 2.0 GHz processor (burst up to 2.5 GHz)
Architecture: 64-bit x86
Intel HD Graphics 500
Yes (AES-NI)
4GB DDR3L (1x 4GB)
8GB (2x 4GB)
2x SODIMM DDR3L up to 1866, with dual-channel support
4GB eMMC
2x 3.5" SATA 6 Gbps HDD
3.5" SATA 6Gb/s HDD
2.5" SATA 6Gb/s HDD
2.5" SATA 6Gb/s SSD
3.5" drive bay: 1 to 2
1x RJ45
2x USB 3.0, 3x USB 2.0
Front: USB 3.0 Type-A
1 PCIe 2.0 x2 slot
1x HDMI v1.4b (up to 3840 x 2160 resolution at 30Hz)
Yes, supporting Qnap RM-IR004 remote control (optional purchase)
1x Speaker, 2x MIC Input
1x 3.5mm line-out jack
Alarm buzzer
Status/power, LAN, USB, HDD 1 - 2
Power, Reset, USB One-touch-copy
Alarm buzzer and voice prompts
Tower
HDD standby: 8.08W
In operation: 15.25W (with 2x 1TB HDDs installed)
Sound pressure (LpAm): 17.3 dB(A)
65W AC adapter, 100-240V
1x 7cm (2.76")
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)
Kensington security slot
QTS 4.3.4 (embedded Linux)
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
Apple Safari 7 or later
Google Chrome
Microsoft Internet Explorer 10 or later
Mozilla Firefox
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
Internal hard drive (EXT4)
External hard drive (EXT3, EXT4, NTFS, FAT32, HFS+ and exFAT)
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
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 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
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
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 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
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
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)
Microsoft Active Directory (AD) and domain controller support
LDAP server and client
Domain user login (AFP, CIFS/SMB, FTP and File Station)
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
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
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
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)
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 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 over SSL/TLS (explicit)
FXP support
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)
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 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
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
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
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
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
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
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 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
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 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
Audio and video sharing for Windows & Mac iTunes
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
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
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
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
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
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
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
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
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
Failover solution designed for QVR Pro to ensure server availability
Viewing task details during the failover period
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
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)
Support for DLNA/UPnP TVs and players such as PlayStation 4 and Xbox One
Support for CUE indexing file for APE and FLAC
Monitoring of multiple NAS devices
Utilization history reports
Unified configuration management
Monitoring of NAS devices behind NAT routers with Connect to Q'center
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)
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
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
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
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
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
Photo, video and music playback on TV through HDMI
Support for Chrome and Firefox
Support for international keyboards and mouse input
User login permissions
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
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
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
168 x 105 x 226mm (6.61 x 4.13 x 8.90")
1.53kg (3.37 lbs)
885022015672
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.