Western Digital (WD) has streamlined its data center drive offerings into four powerful and purpose-built series. Each one is tailored to a specific capacity range and performance requirement—making it easier than ever to select the right HDD for your storage infrastructure.

1. WD Ultrastar HA340 – 4TB to 12TB (Air-Filled)

Ideal for general-purpose enterprise workloads, the HA340 series is air-filled and covers all capacities from 4TB to 12TB. These drives are reliable, affordable, and optimized for standard storage deployments.

Part Numbers:

Capacity	Interface	Security	Model Number	Part Number
4TB	SATA	Base (SE)	0B47076	WUS721204BLE6L4
4TB	SATA	Base (SE)	0B46940	WUS721204BLE604
6TB	SATA	Base (SE)	0B47077	WUS721206BLE6L4
6TB	SATA	Base (SE)	0B46950	WUS721206BLE604
8TB	SATA	Base (SE)	0B47078	WUS721208BLE6L4
8TB	SATA	Base (SE)	0B46951	WUS721208BLE604
10TB	SATA	Base (SE)	0B47062	WUS721210BLE6L4
10TB	SATA	Base (SE)	0B47060	WUS721210BLE604
12TB	SATA	Base (SE)	0B47063	WUS721212BLE6L4
12TB	SATA	Base (SE)	0B47061	WUS721212BLE604

2. WD Ultrastar HC555 – 14TB to 20TB (Helium-Filled)

These helium-filled drives are built for modern cloud-scale workloads. Available in SATA and SAS interfaces, HC555 drives cover 12TB through 20TB, with multiple security options like SE, SED, and TCG.

Part Numbers (selected):

Capacity	Interface	Security	Model Number	Part Number
20TB	SATA	512e SED NP3	0B48719	WUH722020CLE6L1
20TB	SATA	512e SE NP3	0B48724	WUH722020CLE6L4
20TB	SAS	512e SED P3	0B48714	WUH722020CL5201
20TB	SAS	512e SE P3	0B47749	WUH722020CL5204
18TB	SATA	512e SE NP3	0B48723	WUH722018CLE6L4

More options available upon request.

3. WD Ultrastar HC580 – 22TB Only (Helium-Filled)

If you're looking for exactly 22TB, HC580 is the exclusive choice. This series is helium-filled and offers Base and SED security options. It sits between the HC555 and HC590 series in terms of density and workload optimization.

Part Numbers:

Capacity	Interface	Security	Model Number	Part Number
22TB	SATA	Base (SE)	0F62785	WUH722422ALE6L4
22TB	SATA	SED	0F62784	—

4. WD Ultrastar HC590 – 24TB and 26TB (Helium-Filled)

The HC590 series tops the chart with 24TB and 26TB drives, fully optimized for maximum density and performance in hyperscale environments. Available in SATA and SAS, with advanced security including SE and TCG.

Part Numbers:

Capacity	Interface	Security	Model Number	Part Number
24TB	SAS	SE	0F59373	WUH722624AL5204
24TB	SAS	TCG	0F65628	WUH722624AL5201
24TB	SATA	SE	0F65684	WUH722624ALE6L4
24TB	SATA	TCG	0F65642	WUH722624ALE6L1
26TB	SAS	SE	0F59375	WUH722626AL5204
26TB	SAS	TCG	0F65638	WUH722626AL5201
26TB	SATA	SE	0F65672	WUH722626ALE6L4
26TB	SATA	TCG	0F65650	WUH722626ALE6L1

Conclusion

Western Digital has trimmed the fat and given IT decision-makers a clearer roadmap for storage planning. Whether you're building an entry-level RAID array or scaling cloud capacity to petabyte levels, these four Ultrastar series cover it all—with clarity, performance, and future-readiness.