TS-251+ 2 Bay NAS

Identifiers
MPN	QNAP TS-251+-2G/4TB-SIW
Dimensions / Weight
Key Features
Backup features	Cloud, USB drive, iSCSI LUN
Browser supported A list of web browsers that the product can run or support, typically including major desktop and mobile browsers such as Chrome, Firefox, Safari, Edge, Internet Explorer, Opera, and others. Each value represents a distinct browser name or version range that has been verified to work with the device.	Apple Safari 7+, Google Chrome, Microsoft Internet Explorer 10+, Mozilla Firefox
Device class A free‑text label that identifies the general category or type of a device, such as "NAS", "Server", "Router", "Storage Enclosure" or any other descriptive class used by manufacturers to classify their products. The value is intended to help users quickly understand the primary function or form factor of the item.	Home & Home Office
Installed storage drive type	HDD
Maximum RAM supported The largest amount of internal random‑access memory (RAM) that a network attached storage (NAS) device can accommodate, expressed as a data size such as megabytes or gigabytes. It indicates the upper limit for active processes and multitasking performance on the NAS.	8192 MB
Power consumption HDD standby The electrical power drawn by a hard‑disk drive while it is in standby mode, expressed in watts (W). It represents the minimal energy usage when the drive is powered on but not actively reading or writing data, and can be used to estimate idle consumption or compare efficiency across storage devices.	10.56 W
Power consumption sleep	0.57 W
Power supply location The physical position where the power supply unit is installed or mounted within a device, such as top, bottom, rear, side, front, or built‑in. This attribute helps users understand where to find the power source and plan cable routing or ventilation.	External
Power supply unit PSU capacity The electrical power rating of a power supply unit (PSU), expressed in watts (W). It indicates the maximum output power that the PSU can deliver to connected components, helping users assess compatibility and energy requirements for their system.	60 W
Share folder A list of network file‑sharing protocols that the device can use to expose shared folders or drives. Common values include CIFS/SMB, AFP, NFS, FTP, and WebDAV. The attribute helps users understand which remote access methods are available for mounting or accessing storage on the device.	512
Storage drive sizes supported A list of the physical sizes and types of storage drives that a product can accommodate, such as 2.5‑inch, 3.5‑inch, or M.2. The values are typically separated by commas and may include additional descriptors like "M.2" to indicate an internal solid‑state drive interface.	3.5"
Supported storage drive interfaces List of physical or logical interfaces that allow an internal storage drive to communicate with the system, such as SATA, M.2 PCIe, U.2, SAS, NVMe, or other standard connections.	Serial ATA II, Serial ATA III
Total installed storage capacity The total amount of digital storage that a device or component can hold, expressed with an appropriate unit such as GB, MB, TB, or a descriptive label indicating whether the storage is built‑in or external. This value represents the maximum capacity available for storing data, applications, and media.	4194304 MB
USB 3.2 Gen 1 The total count of USB 3.2 Gen 1 (also known as USB 3.1 Gen 1 or SuperSpeed) ports available on the device, indicating how many peripherals can be connected simultaneously via this interface.	2

QNAP is a Taiwanese technology company that produces network-attached storage (NAS) devices. The company was founded in 2004 and is headquartered in Taipei. QNAP's products are used by consumers, small businesses, and enterprises, and include NAS devices, surveillance solutions, and cloud storage services.