Hard drives for the Ubiquiti UNAS 2
UNAS 2 storage: (2) 2.5"/3.5" HDD/SSD bays. Ubiquiti publishes storage requirements — capacity, CMR recording, spindle speed — rather than a per-drive whitelist. Requirements below are from help.ui.com, cross-checked 2026-11-03.
No per-drive whitelist — spec-based
Official storage requirements (apply to the UNAS 2)
| Storage type | Ubiquiti's requirement |
|---|---|
| 3.5" HDD | 1 TB or larger CMR drive, 7200 RPM read/write recommended. 5400 RPM drives are not recommended for multi-bay consoles running RAID 5/6/10 or ZFS. Ubiquiti's own line: Enterprise HDD 8/16/24 TB. |
| 2.5" SSD/HDD | Minimum 1 TB SATA SSD drawing no more than 5 V. For UniFi Protect, a DRAM cache and ≥ 0.3 DWPD endurance are required. |
Source: Ubiquiti Help Center, "UniFi Storage Requirements and Compatibility". Ubiquiti updates requirements without notice — verify before purchase.
Why there is no drive list here: unlike Synology, QNAP, Asustor, TerraMaster and UGREEN, Ubiquiti does not publish a per-drive compatibility matrix for the UNAS 2. Any standard SATA drive meeting the requirements above is accepted — the practical risks are 5400 RPM drives in parity RAID, SMR drives in rebuild-heavy arrays, and 2.5-inch drives that exceed the 5 V budget.
Full hardware specs: Ubiquiti's official UNAS 2 page.
Drives that meet the spec — cross-checked against five official HCLs
Ubiquiti won't tell you which part number to buy, so here is the strongest public signal there is: CMR NAS/enterprise drives that Synology, QNAP, Asustor, TerraMaster and UGREEN list most widely on their own official compatibility lists.
| Drive | Brand | Series | Listed on | |
|---|---|---|---|---|
| MG04ACA400E | Toshiba | MG04ACA**** | 451 machines/series | price |
| WD1005VBYZ | Western Digital | Gold | 451 machines/series | price |
| WD2005VBYZ | Western Digital | Gold | 451 machines/series | price |
| MG04ACA300E | Toshiba | MG04ACA**** | 418 machines/series | price |
| MG04ACA200E | Toshiba | MG04ACA**** | 416 machines/series | price |
| MG05ACA800E | Toshiba | MG05ACA**** | 393 machines/series | price |
| WD4003FFBX | Western Digital | Red Pro | 390 machines/series | price |
| ST6000NM021A | Seagate | Exos 7E8 | 389 machines/series | price |
UNAS 2 storage — quick answers
Can I use a WD Red Plus or Seagate IronWolf in the UNAS 2?
Yes, provided the specific part number is CMR and (for multi-bay RAID) 7200 RPM-class. The drives in the table above are the most widely listed NAS and enterprise lines across five vendors' official HCLs — the same properties UniFi's requirements ask for. Check each drive's page for exact recording technology and RPM.
Do I have to buy Ubiquiti's Enterprise HDD?
No. Ubiquiti's 8/16/24 TB Enterprise HDD is the vendor-validated option, but the published requirements are vendor-neutral. Third-party CMR NAS drives are not firmware-blocked. What matters is CMR recording, adequate capacity (≥ 1 TB) and 7200 RPM for parity RAID.
Other UniFi consoles
Security: UniFi NAS security posture — new platform, same 12 rules.