WD vs Seagate: Reliability & Price Comparison
Western Digital and Seagate are the only two major HDD manufacturers left. Both make excellent drives, but their product lines, warranty policies, and pricing strategies differ. This page puts their drives side by side so you can compare real prices and make an informed choice instead of relying on brand loyalty.
The reliability question
Backblaze publishes quarterly drive failure data from their datacenter fleet. As of 2025–2026, both WD and Seagate enterprise drives show annual failure rates between 0.5–2.5% depending on model and age. No brand has a decisive reliability edge — individual model selection matters more than the logo on the label.
Quick Verdict
- Who this is for
- NAS builders, server admins, and storage shoppers trying to decide between WD and Seagate product lines.
- What usually wins
- Compare specific models, not brands. WD Red Plus vs Seagate IronWolf, WD Ultrastar vs Seagate Exos — pick whichever is cheaper at your target capacity. Both are reliable when used within their rated workloads.
- Prioritise
- Price per TB for equivalent-tier drives. Then warranty length and workload rating for your specific use case.
Prices updated hourly from Amazon US and UK. All links go directly to the retailer. Details.
Western Digital Drives — Best Prices
WD hard drives across all product lines ranked by price per TB.
Seagate Drives — Best Prices
Seagate hard drives across all product lines ranked by price per TB.
Refurbished Enterprise — WD Ultrastar vs Seagate Exos
Recertified datacenter pulls from both brands — the cheapest high-capacity drives available.
How to Choose
Here is how the two brands compare across the factors that actually matter.
NAS drives
WD Red Plus (CMR) competes with Seagate IronWolf. Both are rated for 1–8 bay NAS use with 180 TB/year workload. Pricing fluctuates — check both and buy whichever is cheaper at your target capacity.
Enterprise drives
WD Ultrastar competes with Seagate Exos. Both offer 5-year warranties, 550 TB/year workload ratings, and vibration sensors for high-density enclosures. Refurbished Exos and Ultrastar drives dominate the used market.
Warranty and RMA
Both brands offer similar warranty terms (2–3 years consumer, 5 years enterprise/Pro). RMA experiences vary by region. Check warranty transfer policies if buying from third-party sellers — some warranties are non-transferable.
Recording technology
Both brands use SMR in some consumer models. Always verify CMR vs SMR for your specific model — brand alone does not guarantee recording technology. NAS and enterprise lines from both brands are CMR.
Related Buying Guides
WD Red Plus vs Seagate IronWolf
Compare WD Red Plus and Seagate IronWolf NAS hard drives by price per TB. Live prices, CMR options, and capacity breakdowns to help you pick the right NAS drive.
Seagate Exos vs WD Ultrastar
Seagate Exos vs WD Ultrastar enterprise HDDs compared by live price per TB. Find the cheaper option for your homelab, server, or NAS build.
Best NAS Hard Drives
Compare NAS hard drive prices from Seagate IronWolf and WD Red. CMR drives ranked by price per TB for Synology, QNAP, TrueNAS, and Unraid builds.
Best Enterprise Hard Drives
Compare enterprise HDD prices for Seagate Exos and WD Ultrastar. Datacenter-grade drives sorted by price per TB for servers and storage arrays.