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 3.2 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
| CPU | Intel® Celeron® J4025/J4005 2-core/2-thread processor, burst up to 2.9/2.7 GHz |
| CPU Architecture | 64-bit x86 |
| Graphic Processors | Intel® HD Graphics 600 |
| Floating Point Unit | |
| Encryption Engine | (AES-NI) |
| Hardware-accelerated Transcoding | |
| System Memory | 4 GB SODIMM DDR4 (1 x 4 GB) |
| Maximum Memory | 8 GB (2 x 4GB) |
| Memory Slot | 2 x SODIMM DDR4 For dual-DIMM configuration, you must use a pair of identical DDR4 modules. |
| Flash Memory | 4GB (Dual boot OS protection) |
| Drive Bay | 2 x 3.5-inch SATA 6Gb/s, 3Gb/s The system is shipped without HDD. For the HDD compatibility list, |
| Drive Compatibility | 3.5-inch SATA hard disk drives 2.5-inch SATA hard disk drives 2.5-inch SATA solid state drives |
| Hot-swappable | |
| M.2 Slot | Optional via a QM2 PCIe adapter |
| SSD Cache Acceleration Support | |
| Gigabit Ethernet Port (RJ45) | 1 Expandable with an optional PCIe adapter |
| 5 Gigabit Ethernet Port (5G/2.5G/1G/100M) | Expandable with an optional PCIe adapter |
| 10 Gigabit Ethernet Port | Expandable with an optional PCIe adapter |
| Wake on LAN (WOL) | |
| Jumbo Frame | |
| PCIe Slot | 1 Slot 1: PCIe Gen 2 x4 PCIe bandwidth limitations will restrict the NAS 10GbE performance. Card dimensions for PCIe slot：190 x 68.9x 18.76 mm / 7.48 x 2.71 x 0.74 inches. |
| USB 2.0 port | 3 |
| USB 3.2 Gen 1 port | 2 |
| USB 3.2 Gen 2 (10Gbps) Port | Optional via a PCIe expansion card |
| IR Sensor | (Optional QNAP RM-IR004 remote control) |
| HDMI Output | 1, HDMI 2.0 |
| Form Factor | Tower |
| LED Indicators | Power/Status, LAN, USB, HDD1-2 |
| Buttons |
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