Ubiquiti UACC-HDD-TRAY 3.5" Hard Drive Tray
Overview
The Ubiquiti UACC-HDD-TRAY is a universal hard drive tray engineered to support local storage expansion across UniFi and UISP network appliances. Whether you're upgrading an existing Dream Machine Pro, configuring a fresh UniFi NVR deployment, or scaling a UNAS-Pro system, this tray provides the mechanical interface needed to mount 3.5" drives without secondary enclosures or adapters. The integrated tray mechanism seats drives securely within compatible chassis, eliminating the friction of external USB docking or proprietary mounting schemes.
Key Features
- Universal 3.5" Form Factor: Accepts standard 3.5" hard drives, the industry baseline for network appliance storage. Cuts out the need for external USB enclosures or single-purpose adapters—one tray, multiple deployment scenarios.
- SGCC Steel and Aluminum Alloy Enclosure: Dual-material construction (SGCC steel with aluminum alloy integration) handles continuous operation in climate-controlled server rooms without corrosion or thermal stress. The material balance trades weight efficiency (201 g) against durability in 24/7 recording environments.
- Dimensions Optimized for Appliance Chassis: At 105.9 × 171.7 × 28 mm (4.2 × 6.8 × 1.1 inches), the tray fits flush within UniFi Dream Machine Pro, UDM-SE, UDM-Pro-Max, UniFi NVR, and UNVR-Pro housings—no external mounting brackets or rack extensions required. Compact footprint preserves desk or rack-mount real estate.
- Lightweight Design: At 201 grams (7.1 oz), the tray itself contributes negligible weight to appliance deployment, reducing strain on mounting systems and simplifying handling during installation or maintenance cycles.
- Seamless Integration with UniFi Ecosystem: Works with UniFi Dream Machine Pro, UDM-SE, UDM-Pro-Max, UniFi NVR, UNVR-Pro, UNAS-Pro, and ENVR appliances. No firmware patches, no compatibility firmware—install and mount. Direct mechanical fit eliminates configuration overhead.
- 24/7 Operating Thermal Profile: Aluminum alloy construction dissipates heat from adjacent drives during continuous recording, preventing thermal throttling in multi-drive configurations. Relevant for warehouse, retail, or remote-site deployments where ambient cooling is limited.
Integration and Compatibility
The UACC-HDD-TRAY (often searched as UACC HDD TRAY) mounts directly within UniFi and UISP appliance chassis using the integrated tray slide mechanism. Compatible appliances include UniFi Dream Machine Pro, UDM-SE, UDM-Pro-Max, UniFi NVR, UNVR-Pro, UNAS-Pro, and ENVR. No separate power distribution or network cabling is required—the tray is a passive mechanical mount. Drives installed in the tray connect to the host appliance's internal backplane automatically upon seating. If you are deploying network storage appliances or building out NVR storage configurations, confirm your appliance model supports the tray form factor before ordering; not all UniFi products include internal tray slots. For multi-camera video management scenarios with retention requirements exceeding built-in storage, this tray is the mechanical foundation—pair it with a compatible large-capacity SATA drive to extend recording window from days to weeks.
What's in the Box
Package contents not specified in manufacturer documentation. Contact your vendor or the appliance manufacturer for pre-sale confirmation of included fasteners, drive alignment guides, or installation template.
Frequently Asked Questions
Q: Does the UACC-HDD-TRAY support 2.5" solid-state drives (SSDs)?
A: The tray is engineered for 3.5" form factor hard drives. 2.5" SSDs may fit physically in some configurations, but mounting stability and thermal contact are not guaranteed. Consult your appliance documentation or contact the manufacturer before attempting 2.5" drive installation.
Q: What's the maximum drive capacity supported by the UACC-HDD-TRAY?
A: The tray itself is capacity-agnostic—it's a passive mechanical mount. The limit depends on your appliance's controller and firmware support. Check your Dream Machine Pro, UDM-SE, or NVR documentation for maximum single-drive capacity and total supported storage.
Q: Can I install the UACC-HDD-TRAY myself, or do I need a technician?
A: The tray is designed for in-field installation by network integrators. If your appliance is running, power it down first, remove the cover (if required), slide the tray into its slots, and secure the drive. No special tools are required. Refer to your appliance's installation manual for step-by-step guidance.
Q: Does the UACC-HDD-TRAY come with a warranty?
A: Warranty terms are not specified in the available product documentation. Contact the vendor or Ubiquiti support for coverage details.
Q: Is the UACC-HDD-TRAY NDAA Section 889 compliant?
A: No certification status is documented in available materials. If NDAA compliance is required for your deployment, confirm directly with Ubiquiti or your integrator before procurement.
The UACC-HDD-TRAY is a straightforward mechanical solve for UniFi appliance storage expansion—no firmware surprises, no proprietary connectors, just a stamped steel and aluminum tray that clips into your Dream Machine Pro or NVR chassis and seats a 3.5" drive. If you've ever fought with external USB enclosures dropping offline on a long cable run or juggled drive swaps in a cramped equipment rack, the internal tray eliminates that friction.
Technical Highlights:
- SGCC and Aluminum Enclosure: Dual-material construction (201 g total) handles 24/7 operation without corrosion or thermal creep. The aluminum provides heat dissipation to the mounted drive; SGCC steel provides rigidity. Matters in non-climate-controlled outdoor cabinets or hot equipment rooms where airflow is tight.
- Compact Form Factor (105.9 × 171.7 × 28 mm): Fits flush within appliance chassis without adapter brackets or external mounting. If you're stacking multiple UniFi appliances on a shelf or in a 1U rack, this tray takes zero additional footprint.
- Universal 3.5" Compatibility: Accepts any standard 3.5" SATA or SAS drive up to the appliance controller's capacity limit. No lock-in to proprietary or MLC-only drives. Upgrade or swap drives without sourcing vendor-specific components.
Deployment Considerations:
- This tray is a passive mount—it has no active cooling fan or power distribution. Drive thermal performance depends on adjacent airflow within the appliance enclosure. In high-ambient environments, monitor drive temperature post-install.
- Not all UniFi appliance models include internal tray slots. Confirm your specific Dream Machine Pro, UDM-SE, or NVR revision supports the tray before committing. A model that doesn't have the mechanical slot will reject the tray.
Deploy the UACC-HDD-TRAY in remote site NVR configurations where you're logging 8–16 camera streams and need 30+ days of retention without external enclosure complexity. It's the right choice for integrators standardizing on internal-only storage architecture and want to avoid USB-dependent backup or secondary appliance sprawl.
