QNAP TR-004U 4-Bay USB 3.0 Hardware RAID Enclosure

The QNAP TR-004U is a 1U rackmount direct-attached storage enclosure designed to provide flexible, hardware-managed RAID storage through a simple USB 3.0 Type-C connection. Supporting four 2.5-inch or 3.5-inch SATA drives, it offers RAID 0, 1, 5, JBOD, and individual disk configurations—all handled by an onboard hardware RAID controller. This means the host system's CPU is freed from RAID processing duties, and RAID configuration is managed through physical switches on the unit rather than software, simplifying deployment considerably.

The enclosure serves a dual purpose: it works as a standard external DAS for any Windows, macOS, or Linux computer, and it can also function as a storage expansion unit for compatible QNAP NAS devices. The lockable drive bays add a layer of physical security in shared environments such as server rooms or offices. Its 1U form factor slides neatly into standard racks, making it a practical choice for small businesses or home labs that need reliable, expandable storage without the complexity or cost of a full NAS appliance.