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The Ubiquiti UNAS Pro 4 is a NAS server equipped with four 2.5"/3.5" HDD drive bays and two M.2 NVMe SSD slots for cache storage. The device integrates seamlessly with the UniFi ecosystem, enabling secure file storage, data backup, and file encryption. It supports RAID 5, RAID 6, and RAID 10, providing enhanced data protection and storage redundancy. For high-speed network connectivity, the server features two 10 Gb/s SFP+ ports and one Gigabit Ethernet port, ensuring excellent throughput within the local network. The UNAS Pro 4 is housed in a 19-inch rack-mountable chassis with a 1U form factor. It includes an integrated 150 W AC/DC power supply and an additional USP-RPS DC input, allowing connection to a USP-RPS redundant power system for improved power reliability. The maximum power budget available for installed drives is 125 W, while the maximum total power consumption of the device is 150 W. Ubiquiti recommends using Ubiquiti-branded hard drives or drives that have been officially qualified as compatible. The current list of supported HDDs and SSDs is available on the manufacturer's website.

UniFi NAS Server
The offered product is a NAS server fully integrated with the UniFi platform. It provides secure data backup, centralized file storage, and file sharing for a wide range of applications. The server delivers high performance thanks to its quad-core ARM Cortex-A57 processor running at 2 GHz and 8 GB of RAM. It features an intuitive management interface with comprehensive system monitoring, allowing you to easily manage storage and monitor device health. The system supports a wide range of advanced features, including backups to other devices or cloud storage, snapshot creation, secure file sharing via protected links, and many other data management and collaboration capabilities.
4x 2.5"/3.5" Drive Bays and 2x M.2 NVMe SSD Slots
The UNAS Pro 4 features four drive bays compatible with 2.5-inch and 3.5-inch HDDs. It supports RAID 5, RAID 6, and RAID 10 configurations, providing reliable protection against data loss through storage redundancy. Ubiquiti recommends using Ubiquiti-branded drives or storage devices listed on its official compatibility list. An up-to-date list of supported HDDs and SSDs is available on the manufacturer's website.
The server also includes two M.2 NVMe slots for SSDs used as cache storage. With a single SSD installed, the system supports read-only caching, while installing two SSDs enables read-write caching, improving overall storage performance.


2x SFP+ Slots and 1x 1G Ethernet Port
For network connectivity, the server is equipped with two 10 Gb/s SFP+ slots and one Gigabit Ethernet port. The high-speed SFP+ interfaces provide excellent bandwidth for fast file transfers and efficient communication across the local network, making the UNAS Pro 4 well suited for demanding storage and data-sharing applications.
19" Rack-Mount Chassis (1U) with AC Power Supply and USP-RPS DC Input
The server is housed in a 19-inch rack-mountable chassis with a 1U form factor. Due to its size and weight, it should be installed using four rack rails, with a supported rack depth ranging from 600 to 1,066 mm. The UNAS Pro 4 features an integrated 150 W AC/DC power supply as well as a dedicated USP-RPS DC input, allowing it to be connected to a UniFi Redundant Power System (RPS) for enhanced power redundancy and uninterrupted operation.

Specifications
| Ubiquiti UNAS-Pro-4 | |
| Overview | |
|---|---|
| Dimensions | 442.4 x 400 x 43.7 mm (17.4 × 15.7 × 1.7") |
| Storage Capacity |
(4) 2.5/3.5" drive bays (2) M.2 NVMe bays |
| Networking Interface |
(2) 10G SFP+ (10G only) (1) GbE RJ45 (1G/100M/10M) |
| Redundancy | Yes (DC Power Backup with UniFi RPS) |
| Form Factor | Rack mount (1U) |
| Hardware | |
| Hard Drive Capacity |
(4) 2.5/3.5" HDD / SSD support (2) M.2 NVMe SSD support |
| Max. Power Budget for Drives | 125 W |
| Max. Power Consumption | 150 W |
| Power Method |
(1) Universal AC input, 100–240V AC, 3A Max., 50/60 Hz (1) USP-RPS DC input, 11.5V DC, 13.91A |
| Power Supply | AC/DC, internal, 150W |
| Processor | Quad-Core ARM® Cortex®-A57 at 2.0 GHz |
| Memory | 8 GB |
| Management | Ethernet |
| RF Interface | Bluetooth 4.1 |
| Weight | 6.7 kg (14.8 lb) |
| Enclosure Material | SGCC steel |
| Mount Material | SGCC steel |
| Supported Rack Depth |
The rails support 600 mm (23.6") four-post racks with square holes (9.5 x 9.5 mm) Posts depths ranging from 600–1066 mm (23.6–42") |
| LEDs |
Ethernet SFP+ RPS HDD System |
| Ambient Operating Temperature | -5 to 40° C (23 to 104° F) |
| Ambient Operating Humidity | 5 to 95% noncondensing |
| NDAA Compliant | Yes |
| Software | |
| Supported File Protocols |
NFS SMB |
| RAID Type |
RAID 5 RAID 6 RAID 10 |
| RAID Group | Single |
| Personal Drive & Shared Drive | Yes |
| SSD Cache | Yes |
| Max. NVMe SSD Capacity Supported | 4 TB |
| File Encryption | Yes |
| Backup to Remote UNAS | Yes |
| Backup to CIFS/SMB Server | Yes |
| Backup to Cloud Services (Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2, Wasabi) | Yes |
| Snapshots | Yes |
| Share Links (share NAS files or folders through secure, time-limited URLs) | Yes |
| Time Machine Backup | Yes |
| Client App Support | Yes |
| User Groups | Yes |






