Which is better for a two-bay NAS?

The 2TB 2-pack, because two drives let you run a mirror for redundancy. The 8TB is better if you would rather use one bay and add a second drive later.

Which gives more storage for the money?

The 8TB. At $374.99 at Best Buy as of November 8, 2026, it is about $46.87 per TB, against about $77.50 per TB for the $309.98 2-pack as of November 5, 2026.

The 8TB lists reads up to 260 MB/s against 175 MB/s for the 2TB. The 2TB lists a higher write speed, 215 MB/s versus 175 MB/s, but the 8TB has the larger 256MB cache.

Which lasts longer under heavy use?

The 8TB carries a 180TB/year workload rating, which suits busier NAS use. No workload rating is listed for the 2TB drive.

Is the 8TB worth the extra money?

Yes if you need one large volume or the workload rating. The 2-pack costs less in total and gives you redundancy, which matters more for a small home NAS.

WD Red Plus 2TB NAS Hard Drive vs WD Red Plus 8TB

Buy the 2-pack of WD Red Plus 2TB if you want two mirrored drives for a small NAS and the lowest cost per terabyte at the listed price. Buy the single WD Red Plus 8TB if you need one large volume, more cache and a higher rated workload. The 2-pack is $309.98 as of November 5, 2026, and the 8TB is $374.99 at Best Buy as of November 8, 2026. That is about $77.50 per TB for the 2-pack versus about $46.87 per TB for the 8TB.

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