QNAP 4-BAY 1U 12 Short-depth Rackmount 3.5 - TR-004U-US

QNAP TR-004U-US 4-Bay 1U Rackmount USB 3.2 Gen 1 RAID Expansion Enclosure

Overview

The QNAP TR-004U-US is a 1U rackmount USB 3.2 Gen 1 RAID expansion enclosure designed to add direct-attached storage capacity to a compatible QNAP NAS or PC without requiring a network storage rebuild. Via a single USB 3.2 Gen 1 Type-C connection, the TR-004U-US delivers up to four additional 3.5-inch SATA drive bays — the right fit for rack deployments where NAS capacity is running thin and a network expansion shelf would add unnecessary complexity. It supports multiple RAID configurations, letting you balance redundancy and usable capacity to match the workload.

Compatibility

The TR-004U-US is compatible with QNAP NAS models that support USB expansion enclosures via USB 3.2 Gen 1 Type-C (or Type-A with adapter). It also functions as a standalone DAS unit connected directly to a PC with a USB 3.2 Gen 1 Type-C port. Drive compatibility is limited to 3.5-inch SATA — slots are rated at 3Gb/s with backward compatibility for SATA 6Gb/s drives, though throughput is capped at 3Gb/s per slot. Plan your drive selection accordingly if sustained sequential throughput is a priority.

Installation Notes

The enclosure occupies a single 1U rack slot with a short-depth chassis, making it practical for shallow network or server cabinets. Connection to the host NAS or PC requires a USB 3.2 Gen 1 Type-C cable — confirm your host has an available Type-C or Type-A USB 3.2 Gen 1 port before ordering. RAID mode is configured at the enclosure level; review QNAP's compatibility list for your specific NAS model to verify expansion enclosure support before deployment.