Which NAS drive should I buy?
By Devin Chua · Reviewed by Claire Bergeron · Updated For most Canadian NAS builds, buy a CMR NAS drive — Seagate IronWolf, WD Red Plus or Toshiba N300 — in the capacity with the best CA$/TB, usually 8 to 16 TB. Step up to IronWolf Pro or WD Red Pro for a busy or business NAS (5-year warranty, higher workload), or to Exos/Ultrastar enterprise drives for the lowest CA$/TB if you can accept the noise. Never buy a plain WD Red (it is SMR) or any SMR drive for a RAID array.
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Standard vs Pro vs enterprise, at a glance
| Standard NAS | Pro NAS | Enterprise | |
|---|---|---|---|
| Examples | IronWolf, Red Plus, N300 | IronWolf Pro, Red Pro | Exos, Ultrastar |
| Recording | CMR | CMR | CMR |
| Workload/year | 180 TB | 550 TB | 550 TB |
| Warranty | 3 years | 5 years | 5 years |
| Noise | quiet | moderate | loud (rack drive) |
| Price per TB | mid | higher | usually lowest |
| Best for | most homes | busy / business NAS | value in a closet/basement |
All three are CMR and RAID-safe. Above ~12–14 TB, only Pro and enterprise drives are available.
The verdict: which should you buy?
The one rule you cannot break: CMR, not SMR
Before capacity or brand, get the recording method right. CMR drives write non-overlapping tracks; SMR drives overlap them and must rewrite whole regions on change, which makes their write speed collapse during a RAID rebuild — turning a repair from hours into days, sometimes failing it. Every drive we recommend is CMR. The classic trap is the plain WD Red (WD20EFAX–WD60EFAX), which is SMR; buy WD Red Plus instead. Full detail in CMR vs SMR.
Standard, Pro or enterprise?
- Standard (IronWolf, WD Red Plus, Toshiba N300): 180 TB/yr, 3-year warranty, quiet — right for the vast majority of home and small-office NAS units.
- Pro (IronWolf Pro, WD Red Pro): 7200 rpm, 550 TB/yr, 5-year warranty — for many concurrent users or a business box, and the only option above ~14 TB from the NAS lines.
- Enterprise (Exos, Ultrastar): often the lowest CA$/TB, CMR and reliable, but built for a rack and audibly so. Great value in a closet, loud in a living room.
Then pick by CA$/TB and capacity
Within the right category, the decision is price per terabyte in Canadian dollars. Size the array first with the drive-count calculator, then buy the capacity with the best CA$/TB in the live NAS-drives table — the sweet spot is usually 8 to 16 TB. Fewer, larger drives for the same capacity also draw less power and leave bays free to expand.
Buying in Canada
Canadians cross-shop Amazon.ca, Best Buy Canada, Canada Computers, Newegg.ca and Memory Express; the cheapest SKU moves between them, and we track Amazon.ca live in CAD as the baseline. It is worth a two-minute check across those before you buy a drive or a NAS.
On importing from Amazon.com: it rarely beats a local CAD price once you add exchange, any duty, brokerage and the harder path to a warranty claim or return. The exchange rate is not a penalty — the honest point is total landed cost plus how much easier a return or RMA is when you bought it in Canada. For a drive that will run 24/7 for years, local warranty support is worth real money.
NAS drives on Amazon.ca, by CA$/TB
CMR NAS drives in stock on Amazon.ca, ranked by price per terabyte in CAD.
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Frequently asked questions
Which NAS drive is best in Canada?
A CMR NAS drive — Seagate IronWolf, WD Red Plus or Toshiba N300 — in the capacity with the best CA$/TB, for most homes. Pro versions add a 5-year warranty for busy NAS units; Exos/Ultrastar enterprise drives give the lowest CA$/TB if noise is not a concern.
Can I use any hard drive in a NAS?
No. Use CMR NAS-rated drives, not SMR desktop drives — SMR collapses during a RAID rebuild. And confirm your NAS's drive policy (Synology's 2025 models had a restriction, reversed for hard drives in DSM 7.3).
How big should my NAS drives be?
Size the array from your target usable capacity with the drive-count calculator, then buy the capacity with the best CA$/TB — usually 8 to 16 TB. Fewer larger drives draw less power and leave room to expand.
Devin Chua works out which drives, RAM and NVMe cache fit which NAS model at nasdrives.ca, and what the RAID choice means for usable capacity, checked against what is in stock on Amazon.ca.
Reviewed by Claire Bergeron, Editor-in-chief