What hard drives does the Ubiquiti UNAS 2 support?

The UNAS 2 takes (2) 2.5"/3.5" HDD/SSD bays. Ubiquiti does not publish a per-drive whitelist; the official requirement is a CMR drive of 1TB or larger, with 7200 RPM recommended — 5400 RPM drives are not recommended for multi-bay RAID or ZFS consoles.

Does the UNAS 2 require Ubiquiti's own hard drives?

No. Ubiquiti sells its own Enterprise HDD line (8, 16 and 24 TB) but any standard 3.5-inch SATA CMR drive meeting the published requirements works. Drives outside Ubiquiti's own line are not blocked by firmware.

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

Drive bays

UNAS

Product line

RAID 1

RAID options

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.

2.5 GbE RJ45

Networking

Compact desktop

Form factor

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

Ubiquiti UNAS 4 (4) 2.5"/3.5" HDD/SSD bays Ubiquiti UNAS Pro (7) 2.5"/3.5" HDD/SSD bays Ubiquiti UNAS Pro 4 (4) 2.5"/3.5" HDD/SSD bays Ubiquiti UNAS Pro 8 (8) 2.5"/3.5" HDD/SSD bays Ubiquiti Enterprise NAS (16) 2.5"/3.5" HDD/SSD bays Ubiquiti UNVR (4) 3.5" HDD bays (2.5" supported) Ubiquiti UNVR Pro (7) 3.5" HDD bays (2.5" supported) Ubiquiti UNVR Instant (1) 3.5" HDD bay All UniFi storage devices →Bays & requirements side by side

Security: UniFi NAS security posture — new platform, same 12 rules.