# Which NAS expansion bay offers the best value for beginners? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which NAS expansion bay offers the best value for beginners?

## Products

### Ubiquiti UniFi UNAS 2
```yaml
product: ubiquiti-unifi-unas-2
brand: Ubiquiti
price_gbp: 132.41
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
capacity: 2 x 3.5in HDD
interface: 2.5 GbE RJ45, 5 Gbps USB-C, PoE++
read_speed: 260 MB/s
write_speed: 160-180 MB/s
power_consumption: 60W maximum
```

- **Price:** £132.41 [^1]
- **Summary:** The UniFi UNAS 2 is a compact two-bay NAS with 2.5 GbE networking, USB-C expansion, RAID 1 support, and PoE++ power through its included 60W adapter. It suits home users, small offices, and existing UniFi customers who want straightforward file sharing, backups, and centralized storage.
- **Ideal For:** It offers strong beginner value with two 3.5in drive bays, simple UniFi Drive management, RAID 1 support, 2.5 GbE networking, and a 199.00 entry price.
- **Additional Sources:** [^2], [^3]

### Ubiquiti UniFi UNAS 4
```yaml
product: ubiquiti-unifi-unas-4
brand: Ubiquiti
price_gbp: 280.35
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
capacity: 4 x 2.5/3.5in HDD bays and 2 M.2 NVMe bays
interface: 1 x 2.5 GbE RJ45 and 1 x 5 Gbps USB-C
power_consumption: 90W maximum
```

- **Price:** £280.35 [^4]
- **Summary:** The UniFi UNAS 4 is a compact desktop NAS with four drive bays, two M.2 NVMe cache slots, 2.5 GbE networking, USB-C expansion, and PoE+++ power. It suits home users, beginners, and small businesses already using UniFi equipment who need flexible RAID storage without a rack-mounted system.
- **Ideal For:** It offers strong beginner value with four 2.5/3.5in drive bays, RAID 5/6/10 support, two NVMe cache slots, and simple UniFi Drive management at a lower price than higher-speed rack-mounted models.

### Ubiquiti UniFi UNAS Pro 7-Bay
```yaml
product: ubiquiti-unifi-unas-pro-7-bay
brand: Ubiquiti
price_gbp: 348.05
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
capacity: 7 2.5/3.5in HDD or SSD bays
interface: 1 x 10G SFP+ and 1 x 1GbE RJ45
read_speed: 799 MB/s
write_speed: 675 MB/s
power_consumption: 160W
```

- **Price:** £348.05 [^5]
- **Summary:** The Ubiquiti UniFi UNAS Pro is a 2U rack-mount NAS with seven 2.5/3.5in drive bays, RAID 5, RAID 6, and RAID 10 support, and 10Gbps networking. It suits homes, small businesses, and UniFi users who need expandable local storage, backups, and high-speed file sharing.
- **Ideal For:** It offers strong beginner value with seven drive bays, straightforward UniFi Drive management, RAID protection, and 10Gbps networking at a relatively low entry price.
- **Additional Sources:** [^6]

---
## References & Sources
[^1]: Ubiquiti Store, accessed 2026-09-13. https://store.ui.com/us/en/products/unas-2
[^2]: Ubiquiti Store Europe, accessed 2026-09-13. https://eu.store.ui.com/eu/en/products/unas-2
[^3]: Newegg, accessed 2026-09-13. https://www.newegg.com/p/0YH-00JY-001C6
[^4]: Ubiquiti Store, accessed 2026-09-13. https://store.ui.com/us/en/products/unas-4
[^5]: Ubiquiti Store, accessed 2026-09-13. https://store.ui.com/us/en/products/unas-pro
[^6]: GETIC, accessed 2026-09-13. https://www.getic.com/product/ubiquiti-unas-pro