Western Digital Purple vs Seagate Surveillance HDD
Both lines are on Synology's official compatibility list — this is not a "which works" question, but a "which fits your machine and workload" one. Everything below is read from Synology's own HCL, refreshed daily.
Western Digital Purple prices Seagate Surveillance HDD prices
Head-to-head on the official list
| Western Digital Purple | Seagate Surveillance HDD | |
|---|---|---|
| Listed on Synology HCL | 163 models ✓ | 149 models |
| Largest listed capacity | 14 TB ✓ | 6 TB |
| Smallest listed capacity | 1 TB | 1 TB |
| Part numbers on list | 38 ✓ | 10 |
| Product line | Surveillance | Surveillance |
Which should you buy?
Coverage-wise, Western Digital Purple appears on more Synology machines (163 vs 149) — for an older or unusual model that margin can matter. Within the same tier, the honest answer is: pick the cheaper part number at your target capacity, then verify it on your exact model's page.
Both lines overlap on 148 Synology models — if yours is one of them, either drive is officially supported.
Popular part numbers (most-listed 12 of 38 / 10)
Western Digital Purple
- WD60PURX - 64T0ZY0 — 6TB, 148 models
- WD40PURZ — 4TB, 148 models
- WD60PURZ - 85ZUFY1 — 6TB, 147 models
- WD20PURZ — 2TB, 135 models
- WD30PURZ — 3TB, 134 models
- WD20EJRX — 2TB, 130 models
- WD20PURX — 2TB, 129 models
- WD30EJRX — 3TB, 129 models
- WD30PURX — 3TB, 128 models
- WD60EJRX — 6TB, 126 models
- WD40EJRX — 4TB, 125 models
- WD40PURX - 64GVNY0 — 4TB, 124 models
Seagate Surveillance HDD
- ST1000VX001 - 1Z4102 — 1TB, 140 models
- ST6000VX0003 — 6TB, 118 models
- ST3000VX006 - 1HH166 — 3TB, 113 models
- ST2000VX003 - 1HH164 — 2TB, 94 models
- ST1000VX001 - 1HH162 — 1TB, 94 models
- ST4000VX000 - 1F4168 — 4TB, 91 models
- ST3000VX002 — 3TB, 91 models
- ST5000VX0001 - 1SH17X — 5TB, 56 models
- ST6000VX0011 - 1T317Z — 6TB, 56 models
- ST6000VX0001 - 1SH17Z — 6TB, 56 models
Synology models that list both lines
These machines officially support both Western Digital Purple and Seagate Surveillance HDD — your real decision is workload and price, not compatibility.