Western Digital Ultrastar DC HC550 on the Synology, QNAP, Asustor & TerraMaster compatibility lists
Enterprise 14–18 TB
8 Western Digital Ultrastar DC HC550 part numbers appear on Synology's and QNAP's official HCLs, officially supported across 229 NAS models. Every capacity below is vendor-confirmed — pick a part number, then check it against your machine.
All Western Digital Ultrastar DC HC550 drives on the list
Ranked by how many Synology, QNAP, Asustor, TerraMaster and UGREEN machines/series list each part number. Click through for exact model-by-model support.
| Part number | Capacity | Listed on | Check per model |
|---|---|---|---|
| WUH721816ALE6L4 | 16TB | 227 machines | See compatible models → |
| WUH721818ALE6L4 | 18TB | 165 machines | See compatible models → |
| WUH721816ALE6L0 | 16TB | 162 machines | See compatible models → |
| WUH721818ALE6L0 | 18TB | 162 machines | See compatible models → |
| WUH721816ALE6L1 | 16TB | 159 machines | See compatible models → |
| WUH721818ALE6L1 | 18TB | 95 machines | See compatible models → |
| WUH721814ALE6L4 | 14TB | 87 machines | See compatible models → |
| WUH721814ALE6L1 | 16TB | 86 machines | See compatible models → |
Buying tip
Synology, QNAP, Asustor, TerraMaster and UGREEN list 8 Western Digital Ultrastar DC HC550 variants, but the high-capacity part numbers (above 12TB) tend to appear only on newer models. If you run an older or 2-bay machine, confirm your exact model on the drive page before ordering — a same-series part number is not always interchangeable.