Buying Guide
The Best NAS Hard Drives
Five NAS hard drives compared, from the Red Plus 12TB to the N300 16TB, with the trade-offs of each named.
By The PC Journal editorial team
12 min read5 products evaluated
A NAS drive is built for years of 24/7 use inside a multi-drive enclosure, with firmware and vibration handling that desktop drives lack. We ordered these by capacity and noted recording type, workload rating and warranty from each listing.
This is a research roundup, not a lab test: capacity, spindle speed and cache come from each maker's published specs; a missing cache is flagged, not filled in, and no figure here comes from our own testing.
Quick Picks
Our 5 recommendations at a glance. Tap a pick for the full verdict.
Highest Workload Rating
Seagate IronWolf Pro 16TB
The highest workload rating here (550TB/year).
Best for: Arrays that run backups and media serving all day.
Our take Check price for Seagate IronWolf Pro 16TB (opens in a new tab)
Also Consider
Seagate IronWolf 16TB
IronWolf Health Management monitoring.
Best for: Buyers who want IronWolf Health Management monitoring.
Our take Check price for Seagate IronWolf 16TB (opens in a new tab)
Premium Pick
Toshiba N300 16TB
Integrated rotational vibration sensors at the highest price in the group.
Best for: Buyers for whom price is not the deciding factor, since the Red Plus 12TB costs less.
Our take Check price for Toshiba N300 16TB (opens in a new tab)
Largest Cache Size
WD Red Plus 12TB
The largest cache size here (512MB).
Best for: Buyers who put cache size first.
Our take Check price for WD Red Plus 12TB (opens in a new tab)
Strong Alternative
Seagate IronWolf Pro 12TB
Extra data protection in the event of power loss.
Best for: Buyers who want extra data protection in the event of power loss.
Our take Check price for Seagate IronWolf Pro 12TB (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| The highest workload rating here (550TB/year). | Arrays that run backups and media serving all day. | Check price for Seagate IronWolf Pro 16TB (opens in a new tab) |
| IronWolf Health Management monitoring. | Buyers who want IronWolf Health Management monitoring. | Check price for Seagate IronWolf 16TB (opens in a new tab) |
| Integrated rotational vibration sensors at the highest price in the group. | Buyers for whom price is not the deciding factor, since the Red Plus 12TB costs less. | Check price for Toshiba N300 16TB (opens in a new tab) |
| The largest cache size here (512MB). | Buyers who put cache size first. | Check price for WD Red Plus 12TB (opens in a new tab) |
| Extra data protection in the event of power loss. | Buyers who want extra data protection in the event of power loss. | Check price for Seagate IronWolf Pro 12TB (opens in a new tab) |
Our Picks
Highest Workload Rating1 of 5
Seagate IronWolf Pro 16TB on Amazon (opens in a new tab)
The IronWolf Pro 16TB stands out for AgileArray firmware with dual-plane balancing and time-limited error recovery, and it adds rotational vibration sensors for multi-bay arrays.
Best for
- Arrays that run backups and media serving all day.
Skip if
- If budget leads, the Red Plus 12TB was cheaper at our last price check.
Why we like it
It also is rated for 16TB and offers a 7,200 RPM spindle speed. It matches the IronWolf 16TB and the N300 16TB on capacity (16TB). It matches the IronWolf 16TB and the IronWolf Pro 12TB on cache size (256MB).
Its 550TB/year workload rating is the highest here; the N300 16TB comes next at 180TB/year. It matches the IronWolf Pro 12TB on warranty (5-year). Nothing else here matches its 2.5M hours rated MTBF; the IronWolf Pro 12TB comes closest at 1.2M hours.
It also offers IronWolf Health Management monitoring. Check your NAS maker's compatibility list for the exact model; a drive can work in one enclosure and be unsupported in another. It is a 3.5-inch SATA drive, so it needs a bay that takes 3.5-inch drives and a SATA connection, which every NAS enclosure provides. Its price falls between the IronWolf Pro 12TB and the IronWolf 16TB, based on our last check.
Key dimensions & specs
- Capacity: 16TB
- Spindle speed: 7,200 RPM
- Cache: 256MB
- Recording: CMR
- Workload rating: 550TB/year
- Warranty: 5-year
- MTBF: 2.5M hours
- Data recovery: 3 years included
Pros
- a 7,200 RPM spindle for faster file access
- a 256MB cache
- CMR recording, which suits RAID arrays
- a 550TB/year workload rating
Cons
- Costs more than the Red Plus 12TB at the time of writing
Also Consider2 of 5
Seagate IronWolf 16TB on Amazon (opens in a new tab)
The IronWolf 16TB stands out for IronWolf Health Management monitoring, and it adds less wear, noise and vibration in a NAS enclosure, by Seagate's claim.
Best for
- Buyers who want IronWolf Health Management monitoring.
Skip if
- Its workload rating is not published, which rules it out if you need that number.
Why we like it
It also is rated for 16TB and offers a 7,200 RPM spindle speed. It matches the IronWolf Pro 16TB and the N300 16TB on capacity (16TB). It matches the N300 16TB and the Red Plus 12TB on warranty (3-year).
On rated MTBF it trails the group at 1M hours, while the IronWolf Pro 16TB offers 2.5M hours. Check your NAS maker's compatibility list for the exact model; a drive can work in one enclosure and be unsupported in another. It is a 3.5-inch SATA drive, so it needs a bay that takes 3.5-inch drives and a SATA connection, which every NAS enclosure provides.
On price it sat fourth of 5, between the cheaper IronWolf Pro 16TB and the pricier N300 16TB, at the time of writing. The maker doesn't give its workload rating; if that figure matters, the IronWolf Pro 16TB is rated for 550TB/year.
Key dimensions & specs
- Capacity: 16TB
- Spindle speed: 7,200 RPM
- Cache: 256MB
- Recording: CMR
- Warranty: 3-year
- MTBF: 1M hours
- Rated for up to: 8 bays
- Data recovery: 3 years included
Pros
- a 7,200 RPM spindle for faster file access
- a 256MB cache
- CMR recording, which suits RAID arrays
- 3 years of Rescue Data Recovery Services
Cons
- No published workload rating
- Rated MTBF trails the IronWolf Pro 16TB (2.5M hours)
- Costs more than the Red Plus 12TB at the time of writing
Premium Pick3 of 5
Toshiba N300 16TB on Amazon (opens in a new tab)
The N300 16TB is built around integrated rotational vibration sensors, with 24/7 operation in 1-to-8-bay NAS systems on top.
Best for
- Buyers for whom price is not the deciding factor, since the Red Plus 12TB costs less.
Skip if
- The maker gives no cache size, so skip it if that figure decides your choice.
Why we like it
On the spec sheet, it is rated for 16TB and offers a 7,200 RPM spindle speed. It matches the IronWolf Pro 16TB and the IronWolf 16TB on capacity (16TB). On workload rating it ties with the Red Plus 12TB at 180TB/year.
It matches the IronWolf 16TB and the Red Plus 12TB on warranty (3-year). You also get a design for heat protection and long service. Check your NAS maker's compatibility list for the exact model; a drive can work in one enclosure and be unsupported in another.
It is a 3.5-inch SATA drive, so it needs a bay that takes 3.5-inch drives and a SATA connection, which every NAS enclosure provides. It was the most expensive pick when we checked, so weigh what it adds over the IronWolf 16TB. Buyers who need a confirmed cache size should compare it with the Red Plus 12TB, which comes in at 512MB.
Key dimensions & specs
- Capacity: 16TB
- Spindle speed: 7,200 RPM
- Workload rating: 180TB/year
- Warranty: 3-year
- Rated for up to: 8 bays
Pros
- a 7,200 RPM spindle for faster file access
- a 180TB/year workload rating
- Integrated rotational vibration sensors
- 24/7 operation in 1-to-8-bay NAS systems
Cons
- No published cache size
- No published rated MTBF
- Costs more than the Red Plus 12TB at the time of writing
Largest Cache Size4 of 5
WD Red Plus 12TB on Amazon (opens in a new tab)
What the Red Plus 12TB brings to the table is NASware firmware for NAS compatibility, plus a build for small and medium business NAS in a 24x7 environment.
Best for
- Buyers who put cache size first.
Skip if
- Skip it if workload rating matters most to you; the IronWolf Pro 16TB offers 550TB/year.
Why we like it
It also is rated for 12TB and offers a 7,200 RPM spindle speed. It matches the IronWolf Pro 12TB on capacity (12TB). Its 512MB cache size is the largest here; the IronWolf Pro 16TB comes next at 256MB.
On workload rating it ties with the N300 16TB at 180TB/year. It matches the IronWolf 16TB and the N300 16TB on warranty (3-year). Check your NAS maker's compatibility list for the exact model; a drive can work in one enclosure and be unsupported in another.
It is a 3.5-inch SATA drive, so it needs a bay that takes 3.5-inch drives and a SATA connection, which every NAS enclosure provides. The listing rates it for NAS systems of up to 8 bays, so check your enclosure's bay count against that. It undercut the IronWolf Pro 12TB and every other pick on price at the time of writing. The trade-off is workload rating; for more, the IronWolf Pro 16TB is rated for 550TB/year.
Key dimensions & specs
- Capacity: 12TB
- Spindle speed: 7,200 RPM
- Cache: 512MB
- Recording: CMR
- Workload rating: 180TB/year
- Warranty: 3-year
- Rated for up to: 8 bays
Pros
- a 7,200 RPM spindle for faster file access
- a 512MB cache
- CMR recording, which suits RAID arrays
- a 180TB/year workload rating
Cons
- Workload rating trails the IronWolf Pro 16TB (550TB/year)
- No published rated MTBF
Strong Alternative5 of 5
Seagate IronWolf Pro 12TB on Amazon (opens in a new tab)
The IronWolf Pro 12TB stands out for extra data protection in the event of power loss, and it adds lower power consumption than earlier models, by Seagate's claim.
Best for
- Buyers who want extra data protection in the event of power loss.
Skip if
- Skip it if capacity matters most to you; the IronWolf Pro 16TB offers 16TB.
Why we like it
It also is rated for 12TB and offers a 7,200 RPM spindle speed. On capacity it ties with the Red Plus 12TB at 12TB. On cache size it ties with the IronWolf Pro 16TB and the IronWolf 16TB at 256MB.
On warranty it ties with the IronWolf Pro 16TB at 5-year. Its 1.2M hours rated MTBF ranks second of 3 here, behind the IronWolf Pro 16TB (2.5M hours) and ahead of the IronWolf 16TB (1M hours). It also offers IronWolf Health Management monitoring.
Check your NAS maker's compatibility list for the exact model; a drive can work in one enclosure and be unsupported in another. When we checked, only the Red Plus 12TB cost less, and the IronWolf Pro 16TB cost more. Capacity is its weakest area, and the IronWolf Pro 16TB covers it better at 16TB.
Key dimensions & specs
- Capacity: 12TB
- Spindle speed: 7,200 RPM
- Cache: 256MB
- Warranty: 5-year
- MTBF: 1.2M hours
- Rated for up to: 24 bays
- Max transfer rate: 250MB/s
- Data recovery: 3 years included
Pros
- a 7,200 RPM spindle for faster file access
- a 256MB cache
- a 5-year warranty
- 3 years of Rescue Data Recovery Services
Cons
- Capacity trails the IronWolf Pro 16TB (16TB)
- Cache size trails the Red Plus 12TB (512MB)
- No published workload rating
How We Chose These NAS Hard Drives
Each pick was assessed across 4 criteria weighted for real-world use.
- What we compared
- We compared five NAS hard drives on capacity, spindle speed, cache size and recording as the makers state them. Nothing was tested in-house; 3 of the 9 fields compared are stated for every pick, while cache size and recording have gaps.
- The shared baseline
- All 5, from the IronWolf Pro 16TB to the IronWolf Pro 12TB, state capacity, spindle speed and warranty.
- Where the specs have gaps
- The N300 16TB gives no cache size; the N300 16TB and the IronWolf Pro 12TB give no recording.
- Price range
- At our last check the picks ran from the Red Plus 12TB ($250 to $500) to the N300 16TB ($500 to $1000).
What to Look for in an NAS Hard Drive
Key buying criteria so you get the right fit the first time.
How much capacity you need
The IronWolf Pro 16TB tops capacity at 16TB and the IronWolf Pro 12TB sits lowest at 12TB; 3 picks share the top figure. The IronWolf Pro 16TB is the pick for capacity.
Warranty across these picks
Across these 5 picks warranty spans 3-year (the Red Plus 12TB) to 5-year (the IronWolf Pro 16TB). The IronWolf Pro 12TB comes second at 5-year, in the same price tier as the IronWolf Pro 16TB.
Cache size
Across these 4 picks cache size spans 256MB (the IronWolf Pro 12TB) to 512MB (the Red Plus 12TB). Start with the Red Plus 12TB if cache size decides it. The N300 16TB gives no cache size figure, so 4 of 5 picks are compared here.
Features beyond the spec table
The N300 16TB: 24/7 operation in 1-to-8-bay NAS systems. The Red Plus 12TB: a build for small and medium business NAS in a 24x7 environment. The IronWolf Pro 12TB: lower power consumption than earlier models, by Seagate's claim.
Budget
$250 to $500 buys the Red Plus 12TB; $500 to $1000 buys the IronWolf Pro 12TB, the IronWolf Pro 16TB, the IronWolf 16TB and the N300 16TB at our last check.
How to Choose an NAS Hard Drive
By priority
| Priority | Consider | Why |
|---|---|---|
| Arrays that run backups and media serving all day | IronWolf Pro 16TB | The highest workload rating here (550TB/year) |
| Buyers who want IronWolf Health Management monitoring | IronWolf 16TB | IronWolf Health Management monitoring |
| Buyers for whom price is not the deciding factor, since the Red Plus 12TB costs less | N300 16TB | Integrated rotational vibration sensors at the highest price in the group |
| Buyers who put cache size first | Red Plus 12TB | The largest cache size here (512MB) |
| Buyers who want extra data protection in the event of power loss | IronWolf Pro 12TB | Extra data protection in the event of power loss |
Scroll sideways to see every column.
Key specs side by side
The IronWolf Pro 16TB leads on capacity at 16TB, ahead of the IronWolf 16TB at 16TB. "Not listed" marks cache size where the N300 16TB leaves the figure out.
| NAS Hard Drive | Capacity | Spindle speed | Cache | Recording |
|---|---|---|---|---|
| IronWolf Pro 16TB | 16TB | 7,200 RPM | 256MB | CMR |
| IronWolf 16TB | 16TB | 7,200 RPM | 256MB | CMR |
| N300 16TB | 16TB | 7,200 RPM | Not listed | Not listed |
| Red Plus 12TB | 12TB | 7,200 RPM | 512MB | CMR |
| IronWolf Pro 12TB | 12TB | 7,200 RPM | 256MB | Not listed |
Scroll sideways to see every column.
By price at the time of writing
At our last check the cheapest pick, the Red Plus 12TB, sat in the $250 to $500 tier, 2 tiers in all up to the N300 16TB at $500 to $1000; Amazon prices move, so recheck before buying.
| Price tier | NAS Hard Drives |
|---|---|
| About $250 to $500 | Red Plus 12TB |
| About $500 to $1000 | IronWolf Pro 12TB, IronWolf Pro 16TB, IronWolf 16TB, N300 16TB |
Frequently Asked Questions
How does the IronWolf Pro 16TB compare with the Red Plus 12TB on cache size?
The Red Plus 12TB leads at 512MB, with the IronWolf Pro 16TB at 256MB. No cache size figure is published for the N300 16TB, which leaves 4 of 5 picks ranked here.
Is the IronWolf Pro 16TB ahead of the N300 16TB on workload rating?
The IronWolf Pro 16TB tops workload rating at 550TB/year; the N300 16TB follows at 180TB/year, 206% apart. The IronWolf 16TB and the IronWolf Pro 12TB are left out of this ranking because their workload rating isn't stated; 3 of 5 picks are ranked.
Is the IronWolf Pro 16TB ahead of the IronWolf Pro 12TB on rated MTBF?
The IronWolf Pro 16TB tops rated MTBF at 2.5M hours; the IronWolf Pro 12TB follows at 1.2M hours, 108% apart. The IronWolf 16TB is at the other end of this group with 1M hours. The N300 16TB and the Red Plus 12TB are left out of this ranking because their rated MTBF isn't stated; 3 of 5 picks are ranked.
Is the N300 16TB worth paying more than the Red Plus 12TB?
What it brings is capacity (16TB against 12TB). The Red Plus 12TB sat in the $250 to $500 tier and the N300 16TB in the $500 to $1000 tier when we checked, with 3 other picks between them; pay the difference only if capacity decides your purchase.
What makes the IronWolf Pro 16TB the Highest Workload Rating?
The label rests on the highest workload rating here (550TB/year). The N300 16TB is next on workload rating at 180TB/year, so this pick's 550TB/year is 206% further out. It gives up cache size (256MB against 512MB) to the Red Plus 12TB, the cheapest pick. It is aimed at arrays that run backups and media serving all day.
Do the IronWolf 16TB and the IronWolf Pro 12TB differ on rated for up to?
The IronWolf 16TB, the N300 16TB and the Red Plus 12TB use 8 bays; the IronWolf Pro 12TB uses 24 bays. The maker of the IronWolf Pro 16TB doesn't state rated for up to, so 4 of 5 picks are covered here.
Bottom Line
Our first pick is the IronWolf Pro 16TB. Look at the IronWolf 16TB for IronWolf Health Management monitoring, the N300 16TB for integrated rotational vibration sensors at the highest price in the group and the Red Plus 12TB for the largest cache size here (512MB) if those matter more to you.
Check your NAS maker's compatibility list for the exact drive model, and keep a second copy of anything you cannot replace.