4-bay desktop UniFi NAS — white
Ubiquiti UNAS-4-W UniFi NAS — White
The Ubiquiti UNAS-4-W UniFi NAS is the white UNAS 4 desktop platform with four 2.5/3.5-inch drive bays, two M.2 NVMe SSD cache slots, 2.5GbE networking, 5Gbps USB-C and an included 90W PoE+++ adapter.
- Processor
- Quad-core ARM Cortex-A55 at 1.7GHz
- Memory
- 4GB
- Storage
- 4 drive bays + 2 M.2 NVMe bays
- Networking
- 1 × 2.5GbE RJ-45
Compact UniFi storage with SSD caching
The Ubiquiti UNAS-4-W UniFi NAS brings file storage, sharing, encryption, snapshots and backup into UniFi Drive. Its four SATA bays support 2.5-inch and 3.5-inch drives, while two M.2 NVMe bays are specified for SSD caching with up to 2TiB supported per current platform guidance.
Four flexible drive bays
Install qualified 2.5-inch or 3.5-inch drives in the four desktop bays.
Dual NVMe cache slots
Two M.2 NVMe bays support SSD caching for the UniFi Drive storage platform.
2.5GbE connection
A single multi-rate 2.5GbE RJ-45 port connects the appliance to a compatible network.
UniFi Drive features
Current support includes personal and shared drives, file encryption, snapshots and share links.
Multiple backup targets
Backups can be directed to a remote UNAS, CIFS/SMB server or listed cloud services.
PoE-powered desktop design
The included 90W PoE+++ adapter supplies the NAS and its installed storage within the stated budgets.
Who is the Ubiquiti UNAS-4-W UniFi NAS best for?
A strong choice for
- UniFi environments needing desktop file storage
- Four-drive RAID 5, RAID 6 or RAID 10
- Users wanting SSD caching
- Time Machine backup destinations
- Local and cloud backup workflows
Consider another model if you need
- You need built-in 10Gbps networking
- You need more than four primary drive bays
- Your selected drives are not on Ubiquiti's qualified list
- You require multiple RAID groups or hot-spare support
Key specifications
- Variant SKU
- UNAS-4-W
- Platform model
- UNAS-4
- Colour
- White
- Processor
- Quad-core ARM Cortex-A55 at 1.7GHz
- Memory
- 4GB
- Drive bays
- 4 × 2.5/3.5-inch
- M.2 NVMe bays
- 2
- Networking
- 1 × 2.5GbE RJ-45
- USB-C
- 1 × 5Gbps
- Power
- PoE+++; 90W adapter included
- Dimensions
- 246 × 129 × 224.5 mm
- Weight
- 2.6 kg
Full technical specifications
Processor, storage and network
| Variant SKU | UNAS-4-W |
|---|---|
| Platform model | UNAS-4 |
| Colour | White |
| Processor | Quad-core ARM Cortex-A55 at 1.7GHz |
| Memory | 4GB |
| Drive bays | 4 × 2.5/3.5-inch HDD support |
| M.2 NVMe bays | 2 |
| SSD cache | Supported |
| Maximum NVMe SSD capacity | 2TiB |
| Networking | 1 × 2.5GbE RJ-45 (2.5G/1G/100M/10M) |
| Expansion port | 1 × 5Gbps USB-C |
| USB drive support | Yes |
UniFi Drive features
| Application requirement | UniFi Drive version 3.4.5 or later |
|---|---|
| Mobile apps | iOS 10.32.1 or later; Android 10.35.1 or later |
| File protocols | NFS and SMB |
| RAID types | RAID 5, RAID 6 and RAID 10 |
| RAID groups | Single |
| Personal and shared drives | Supported |
| File encryption | Supported |
| Snapshots | Supported |
| Share links | Supported |
| Time Machine backup | Supported |
| Backup targets | Remote UNAS, CIFS/SMB server, Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2 and Wasabi |
Physical, power and environment
| Dimensions | 246 × 129 × 224.5 mm |
|---|---|
| Form factor | Desktop |
| Display | 1.47-inch colour LCM |
| Weight | 2.6 kg |
| Enclosure | Polycarbonate |
| Maximum drive power budget | 80W |
| Maximum power consumption | 90W |
| Power method | PoE+++ |
| Power supply | 90W PoE+++ adapter included |
| Operating temperature | -5°C to 40°C |
| Operating humidity | 10% to 90% non-condensing |
| Certifications | FCC, CE and IC |
| NDAA compliant | Yes |
Frequently asked questions about the Ubiquiti UNAS-4-W UniFi NAS
What is the UNAS-4-W?
The UNAS-4-W is the white version of Ubiquiti's four-bay UNAS 4 desktop network storage appliance.
Which processor and memory are in the UNAS-4-W?
It has a quad-core ARM Cortex-A55 processor at 1.7GHz and 4GB memory.
Which drives does the UNAS-4-W support?
It provides four qualified 2.5-inch or 3.5-inch drive bays plus two M.2 NVMe bays for SSD caching.
What network connection does the UNAS-4-W use?
It has one multi-rate 2.5GbE RJ-45 port.
Which RAID types does the UNAS-4-W support?
Current UniFi specifications list RAID 5, RAID 6 and RAID 10 in a single RAID group.
Does the UNAS-4-W support SSD caching?
Yes. It has two M.2 NVMe bays and supports SSD cache with a listed 2TiB maximum NVMe SSD capacity.
Can the UNAS-4-W back up to cloud services?
Yes. UniFi lists Google Drive, OneDrive, Dropbox, Amazon S3, Backblaze B2 and Wasabi, plus remote UNAS and CIFS/SMB targets.
Does the UNAS-4-W support Time Machine?
Yes. Time Machine backup is listed among its supported UniFi Drive features.
How is the UNAS-4-W powered?
It uses PoE+++ and includes a 90W PoE+++ adapter.
What are the UNAS-4-W dimensions?
It measures 246 × 129 × 224.5 mm and weighs 2.6 kg.
- Confirm all HDDs, SSDs and accessories against Ubiquiti's current qualified list.
- The M.2 bays are specified for SSD caching.
- UniFi Drive and mobile-app minimum versions may increase over time.
- Actual capacity and performance depend on installed drives, RAID layout and network conditions.
