QNAP 251+ Series NAS Server

Identifiers
MPN	QNAP TS-251+-2G/4TB-IW
Dimensions / Weight
Key Features
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 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
Server operating systems supported A list of operating systems that the server product can run or support, including specific versions and architectures when relevant. Each value represents a distinct OS compatible with the hardware.	Windows Server 2003,Windows Server 2008 R2,Windows Server 2012,Windows Server 2012 R2
Storage Drive Capacity The total amount of data that a storage drive can hold, expressed as a numeric value with an appropriate unit such as GB, MB, or TB. This attribute helps users understand how much information the drive can store and compare storage options across devices.	2048000 MB
Storage drive size The physical width of a storage drive measured in inches or millimetres, typically expressed as the diagonal size of the drive’s enclosure (e.g., 2.5" or 3.5"). This measurement indicates the form factor that determines compatibility with computer bays, external enclosures, and mounting brackets.	3.5"
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.