Ubiquiti UNAS-4 UNAS 4-Bay 2.5GbE USB-C POE++ Tower NAS

Scalable Storage Power in a Compact Tower

The Ubiquiti UNAS-4 delivers high-capacity, high-performance storage with UniFi simplicity. Featuring four HDD bays, dual M.2 NVMe SSD slots, 2.5 GbE networking, USB-C expansion, and PoE+++ power, it is built for professionals and enterprises who need reliable and scalable storage in a sleek desktop form factor.

Highlights

• 4-Bay Storage: Supports up to 4× 2.5" or 3.5" HDDs for expanded capacity

• Dual NVMe SSD Slots: Adds cache acceleration for optimized performance

• 2.5 GbE Networking: Ensures faster file transfers and seamless media streaming

• PoE+++ Power: Single-cable operation with included 90W PoE+++ adapter

• USB-C Expansion: 5 Gbps port for external storage and devices

• Smart Management: Ethernet and Bluetooth 4.1 for simplified setup and control

• Color LCM Display: 1.47" responsive screen for system navigation and monitoring

• Compact Tower Design: Desktop form factor with clean cable-free aesthetics

Key Features

Storage and Performance

• Drive Bays: 4× 2.5"/3.5" HDDs with up to 80W drive budget

• NVMe Support: 2× M.2 NVMe SSD slots for caching and performance boosts

• Processor and Memory: Quad-core ARM Cortex-A55 at 1.7 GHz with 4 GB RAM

Connectivity and Expansion

• Networking: 1× 2.5 GbE RJ45 port (2.5G/1G/100M/10M)

• Expansion: 1× USB-C 5 Gbps port for external devices

• Power: PoE+++ input with included 90W adapter, max consumption 90W

Design and Build

• Form Factor: Desktop tower

• Dimensions: 246 × 129 × 224.5 mm (9.7 × 5.1 × 8.8 inches)

• Weight: 2.6 kg (5.7 lb)

• Display: 1.47" color LCM for real-time system updates

• Material: Durable polycarbonate enclosure

Environmental and Compliance

• Operating Temperature: -5 to 40°C (23 to 104°F)

• Humidity: 10–90% non-condensing

• Certifications: FCC, CE, IC

• NDAA Compliant: Suitable for government and enterprise use

Summary / Conclusion

The Ubiquiti UNAS-4 is the ideal step up for users needing more capacity and speed from their NAS. With four HDD bays, dual NVMe cache slots, and 2.5 GbE networking, it combines storage scalability with modern performance. Powered by PoE+++ for simplified cabling and equipped with USB-C expansion, the UNAS-4 is a powerful, compact solution for growing businesses and advanced home users.