Hard drive (HDD)
Good8/10Mid-rangeWestern Digital's hard drives are widely trusted, and fleet data from Backblaze and a peer-reviewed study rate WD and its HGST lineage among the most reliable. The 2020 SMR row and the 3-year warning flag still colour enthusiast opinion. For a NAS, pick Red Plus or Red Pro, never plain Red.
Good at
- WD Red Plus and Red Pro are trusted CMR drives for NAS
- Clear colour tiers for desktop, NAS, CCTV and enterprise
- Backblaze data has long been kind to WD and HGST drives
- Five-year warranty on Red Pro and Gold
Weak at
- 2020: WD Red drives used SMR without disclosure
- Synology/WD analytics flag NAS drives at 3 years' use (2023)
- 2026 supply largely sold out to data centres; prices up
- Reliability
- Value
- Features
- Service & warranty
WD Red Plus / Red Pro (NAS)WD Red (SMR)WD BlueWD_BlackWD Purple / Purple ProWD Gold / Ultrastar
Best for: NAS and bulk-storage builders who value reliability
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