QNAP 

TS-251D-2G-US QNAP TS-251D - NAS server - 2 bays - SATA 6Gb/s - RAID 0, 1, JBOD - RAM 2 GB - Gigabit Ethernet - iSCSI

Mfg Part Number:  TS-251D-2G-US  
Image may not reflect the actual item.
Price: $381.98
Quantity:
In Stock/Mfg Direct Ship
Last Updated: Feb 13, 2026
No Sales Tax except these states
, PO and Wire.

The TS-251D integrates secure data storage and multimedia entertainment into one device. Featuring a PCIe slot, the TS-251D allows you to flexibly extend NAS functionality and potential applications. You can enhance overall system performance by installing a QNAP QM2 card for M.2 SSD caching/10GbE connectivity combined with Qtier auto-tiering storage and installing a 10GbE/5GbE/2.5GbE network expansion card. In addition, TS-251D can be used with QNAP's smart AI photo management application, QuMagie, which integrates AI image recognition to group similar photos together in album "People", "Things" and "Places". The TS-251D features an HDMI slot to stream multimedia throughout your home. The TS-251D supports dual-channel hardware decoding and transcoding, allowing you to view NAS media files smoothly across various devices.

The PCIe port supports the installation of a 10GbE/5GbE/2.5GbE/ network expansion card, a QM2 card, a USB 3.1 Gen 2 (10Gbps) card, or a wireless network card.

Provide 4K media playback and online transcoding, while enabling 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 previously-recorded data.

QNAP provides a wide range of multimedia applications. You can manage all apps through the Multimedia Console to simplify management.

HBS backs up and synchronizes NAS data to other remote servers or cloud storage, while QuDedup deduplicates data at the source to reduce network bandwidth and storage space.

Use VJBOD (Virtual JBOD) to expand your storage capacity by using the unused storage of other QNAP NAS. Connect up to two TR series USB storage enclosure.

Intel® Celeron® J4005 Dual-Core Processor and AES-NI Hardware Encryption

Powered by Intel® Celeron® J4005 dual-core 2.0 GHz processor (burst up to 2.7 GHz), DDR4 RAM (up to 8 GB), one Gigabit LAN port, and supports SATA 6Gb/s hard drives, the TS-251D combines network expansion cards to create dependable read/write performance. The TS-251D features Intel® AES-NI 256 hardware-accelerated encryption for both full NAS volumes and shared folders, boosting system performance while securing sensitive data stored in the TS-251D.

Smart AI Photo Management

QuMagie integrates QuMagie Core AI image recognition technology for facial recognition, subject identification, and geotagging photos. Similar photos are categorized into People, Places, and Things albums. Moreover, QuMagie features a built-in timeline scroll, customizable folder covers, iOS® Live Photo display and a powerful search tool, to provide you with the ultimate photo management and image sharing solution.

Real-Time 4K Video Transcoding

Featuring advanced Intel® UHD Graphics, the TS-251D supports dual-channel 4K 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 media files on an HDTV using the HDMI output or with Plex® Media Server to stream media files to mobile 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 individual button actions, providing a more user-friendly 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.

Main Specification
General Information
Manufacturer QNAP Systems
Manufacturer Part Number TS-251D-2G-US
Manufacturer Website Address http://www.qnap.com
Brand Name QNAP
Product Model TS-251D-2G
Product Name TS-251D-2G SAN/NAS Storage System
Product Type SAN/NAS Storage System
Storage
Number of Hard Drives Supported 2
Number of Hard Drives Installed 0
Number of Solid State Drive Supported 2
Number of Solid State Drive Installed 0
Flash Memory Capacity 4 GB
Processor & Chipset
Processor Type Celeron
Processor Model J4005
Processor Core Dual-core (2 Core)
Processor Speed 2 GHz
Memory
Standard Memory 2 GB
Memory Technology DDR4 SDRAM
Network & Communication
Ethernet Technology Gigabit Ethernet
I/O Expansions
Number of Total Expansion Bays 2
Number of 2.5"/3.5" Bays 2
Total Number of Expansion Slots 1
Expansion Slot Type PCI Express 2.0 x4
Controllers
Controller Type Serial ATA/600
RAID Supported Yes
RAID Levels 0, 1, JBOD
Interfaces/Ports
HDMI Yes
Total Number of USB Ports 5
Number of USB 2.0 Ports 2
Number of USB 3.0 Ports 3
Network (RJ-45) Yes
Number of Network (RJ-45) Ports 1
Software
Operating System QTS 4.4.1
Management & Protocols
Protocols SSL
Protocols PPTP
Protocols SFTP
Protocols SSH
Protocols DNS
Protocols IPv4
Protocols NFS
Protocols FXP
Protocols CIFS
Protocols BitTorrent
Protocols TLS
Protocols Telnet
Protocols AFP
Protocols FTPS
Protocols DHCP
Protocols iSCSI
Protocols SMSC
Protocols TCP/IP
Protocols DDNS
Protocols RSync
Protocols HTTP
Protocols DLNA
Protocols RTSP
Protocols IPv6
Protocols HTTPS
Protocols UPnP
Protocols SNMP
Protocols WEBDAV
Protocols FTP
Protocols IPSec
Protocols SMB
Protocols TFTP
Protocols L2TP
Protocols SMTP
Protocols LDAP
Power Description
Maximum Power Supply Wattage 65 W
Physical Characteristics
Height 6.6"
Width 4.1"
Depth 8.9"
Form Factor Tower
Weight (Approximate) 3.26 lb
Miscellaneous
Package Contents
  • TS-251D-2G SAN/NAS Storage System
  • 1 x Ethernet Cable
  • AC Adapter
  • Power Cord
  • 8 x Flat Head Screws (for 3.5" HDD)
  • 6 x Flat Head Screws (for 2.5" HDD)
  • Quick Installation Guide (QIG)
Country of Origin Taiwan
Warranty
Limited Warranty 2 Year
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
[0] [true] [Yes] [No] [No]