The TS-251A-2G-US provides the innovative USB 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-2G-US 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-2G-US 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 4GB DDR3L-1600 dual-channel RAM (upgradable to 8GB), dual Gigabit LAN ports, and SATA 6Gb/s, the TS-251A-2G-US can deliver up to 211.88 MB/s throughput for optimizing mission-critical tasks while still being energy efficient. The TS-251A-2G-US 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.
Brand: QNAP
SKU: TS-251A-4G-US
In The Box
TS-251A
2x Ethernet cable
65W AC Adapter
Power cord
8x Flat head screw (for 3.5" HDD)
6x Flat head screw (for 2.5"HDD)
IR Remote Control:RM-IR002
Quick Installation Guide
Special Feature: 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.
Dimensions: 6.65" x 4.02" x 8.62"
Transmission: 2x Gigabit RJ45 LAN port 3x USB 3.0 ports (Front: 1, Rear:2)
Power: 65W AC power adapter, 100-240V AC
Storage: 2x 3.5"/2.5" SATA 6Gb/s HDDs/SSDs
Service: No monthly fee
Hardware
Processor: 14nm Intel® Celeron® N3060 dual-core 1.6GHz (up to 2.48GHz)
System Memory: 4GB DDR3L (2 x 2GB)
Maximum Memory: 8GB
Memory Slot: 2 x SODIMM DDR3L (For dual-DIMM configurations, you must use a pair of identical DDR3L modules.)
Flash Memory: 4GB, pre-loaded with QTS system
Drive Type: 2 x 3.5-inch/2.5-inch SATA 6Gb/s HDDs/SSDs
GbE LAN: 2 x Gigabit RJ45 LAN port
USB Port: 3 x USB 3.0 ports (Front: 1, Rear:2)
USB QuickAccess: (USB 3.0 Micro-B); USB cable is not included
HDMI: 1, max. resolution 3840 x 2160 @ 30Hz
Audio Input: 3.5mm Microphone Input jack (for dynamic microphone)
Audio Output: 3.5mm Line Out jack (for ampliers or speakers)
LED Indicator: Status/Power, USB, HDD 1, HDD 2
Button: Power/Status, USB one-touch-backup, reset
IR Receiver: Supports QNAP RM-IR002 and MCE-compliant remote controls
Others: Kensington security slot, system maintenance port
Operating Temperature: 0-40°C
Relative Humidity: 5-95% RH non-condensing, wet bulb: 27°C
Noise Level: 18.3 dB (A)
Fan: 1 x 7cm system fan (12V DC)
Power
Power: 65W AC power adapter, 100-240V AC
Power Consumption:
System sleep: 0.72W
HDD standby: 7.9W
In operation: 16.2W (with 2 x 2TB HDDs)
Software
Operating System: QTS 4.2 (embedded Linux)
Network & Virtual Switch
DHCP client, DHCP server
USB Wi-Fi Adapter Support
Virtual Switch
Access Right Management
Batch users creation, import/export users
User quota management
Local user access control for CIFS, AFP, FTP, and WebDAV
Application access control for Photo Station, Music Station, Video Station, and File Station
Subfolder permissions support for CIFS/SMB, AFP, FTP, and File Station
Supported Client OS
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
Supported Browsers
Microsoft Internet Explorer 10+, Google Chrome, Apple Safari 7+, Mozilla Firefox
myQNAPcloud Service
Private cloud storage and sharing
Free hostname registration (DDNS)
Optional myQNAPcloud SSL certificates (DDNS)
Auto router configuration (via UPnP)
Web-based file manager with HTTPS 2048-bit encryption
CloudLink for remote access without any complicated router setup
myQNAPcloud connect for easy VPN connection (Windows VPN utility)
File System
Internal Hard Drive: EXT4
External Hard Drive: EXT3, EXT4, NTFS, FAT32, HFS+
Qsync
Sync files across multiple devices with SSL secure connection
Selective synchronization for only syncing specific folders
Use team folders as a file center for greater team collaboration (maximum sync tasks:32)
Shares files by links via e-mail
Policy settings for conflicting files and file type filter support
Version control: up to 64 versions
Supports central configuration mode
Supports remote erase/restore
Supports Windows & Mac OS
Networking
TCP/IP (IPv4 & IPv6: Dual Stack)1
Dual Gigabit NICs (failover, multi-IP settings, port trunking/NIC teaming)
Service binding based on network interfaces
Squid Proxy server & Proxy client
Protocols: CIFS/SMB, AFP (v3.3), NFS(v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, and SMSC
UPnP & Bonjour Discovery
Web Administration
Multi-window, multi-tasking based system management
Dynamic DNS (DDNS)
SNMP (v2 & v3)
Resource monitor
Security
Network access protection with Auto-blocking: SSH, Telnet, HTTP(S), FTP, CIFS/SMB, AFP
CIFS host access control for shared folders
FIPS 140-2 validated AES 256-bit volume-based and shared folder data encryption 2
AES 256-bit external drive encryption2
Importable SSL certificates
Instant alerts via email, SMS, beep, and push service
2-step verification
File Server
File sharing across Windows, Mac, and Linux/ UNIX
Windows ACL
Advanced folder permissions for CIFS/SMB, AFP, FTP
Shared folder aggregation (CIFS/SMB)
Power Management
Wake on LAN
Internal hard drive standby mode
Scheduled power on/off
Automatic power on after power recovery
USB and network UPS support with SNMP management
System sleep mode (S3)
FTP Server
FTP over SSL/TLS (Explicit)
FXP support
Cloud Drive Sync
Multiple cloud account management like Google Drive, Dropbox, OneDrive, and hubiC
Supports multiple cloud accounts
A concurrent job execution and multi-threaded data transfer
Per-account bandwidth throttling
Cloud Backup Station
Amazon S3 Plus (including Amazon S3), Glacier
Google Cloud Storage
WebDAV-based cloud storage
Microsoft Azure
OpenStack Swift
VPN Server
Secure remote access: PPTP?L2TP/IPsec & OpenVPN VPN services
Max number of clients: 45 (15 clients for each protocol)
VPN Client
Supported VPN protocols: PPTP and OpenVPN services
PPTP Authentication: PAP, CHAP, MS-CHAP, MS-CHAPv2
PPTP Encryption: None, AES 40/128 bit, AES 256 bit
OpenVPN Encryption: None, AES 40/128 bit, AES 256 bit
Transmission package monitor
OpenVPN port control & link compression
iTunes Server
Audio and video sharing for Windows & Mac iTunes
DLNA Server
Supports DLNA/UPnP TVs and players such as PlayStation 4 and Xbox One
Support CUE indexing file for APE, FLAC audio format.
Video and Audio On-the-fly Transcoding
OceanKTV
Use the NAS as a karaoke machine.
Display songs by artists, languages, and favorites.
Enhance the experience with effects such as tuning echo, key, or applause
Control the playlist with a mobile app.
Supports keyboard and remote control (RM-RF001/ RM-IR002)
AirPlay & Chromecast
Streams videos, photos and music from NAS to Apple TV or Chromecast via File Station, Music Station, Photo Station, Video Station or mobile app (Qfile, Qmusic, Qphoto or Qvideo).
Note: The Media Streaming add-on app must be installed from the QTS App Center.
Web Server
HTTP/HTTPS Connections
Supports WebDAV Connection
Supports Virtual Host (Max: 32)
Importable SSL Certificate
