
Seagate IronWolf Pro 4TB
Busier NAS boxes and bigger arrays that want speed and a data recovery plan.

Filling a NAS with big drives for less per terabyte.
Our pick: Best value big drive. The Toshiba N300 is a CMR NAS hard drive (7,200 RPM, 8TB to 14TB). It suits filling a NAS with big drives for less per terabyte. The catch: buyers complain about the warranty process (7 negative mentions). Louder than 5,400 RPM drives.
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Specs are from the Amazon listing or the maker. Prices are for the box without drives unless the listing says otherwise.
Buyers complain about the warranty process (7 negative mentions). Louder than 5,400 RPM drives.
NAS drives are built for 24/7 running and RAID: CMR recording, vibration sensors and longer warranties. Desktop SMR drives can stall a RAID rebuild.
Best value big drive. CMR, 7,200 RPM, 512MB cache, rated for 180TB a year. 4.5 stars from 488 ratings. The catch: Buyers complain about the warranty process (7 negative mentions). Louder than 5,400 RPM drives.
CMR. Avoid SMR drives in a NAS: they can slow RAID rebuilds to a crawl.
Two for a 2-bay mirror (RAID 1). For four or more bays, RAID 5 or Synology SHR uses one drive’s worth of space for protection. Buy drives of the same size, and keep a separate backup: RAID is not a backup.
From the Amazon listing, in the maker's own words.

Busier NAS boxes and bigger arrays that want speed and a data recovery plan.

Families and small offices who want Synology software with room for four drives.

Most people who want a strong, simple 4-bay that will not run out of power.