HDD|Hunt

Why Price Per TB Is the Only Storage Metric That Matters

By Jake Torres ·
storage buying guide price per tb

I’ve been building storage arrays since college. Back then I was buying 2TB Barracudas and thinking I was hot stuff. Today I’m running 200TB+ on a TrueNAS Scale box, and the one thing that hasn’t changed is the math: price per terabyte is the only number that matters when you’re buying drives.

Not the sticker price. Not the brand. Not whether the box is a pretty shade of blue. Price per TB.

What Is Price Per TB?

It’s dead simple. Take the price of the drive, divide by the capacity in terabytes.

  • A 4TB drive for $80 = $20/TB
  • A 16TB drive for $200 = $12.50/TB
  • A 20TB drive for $300 = $15/TB

That 16TB drive is the best value even though it’s not the cheapest or the biggest. That’s the insight most people miss.

Why Sticker Price Lies to You

Here’s the trap I see people fall into constantly on r/DataHoarder: they see a 4TB drive for $65 and think “great deal!” Meanwhile a 14TB drive is sitting at $180 — less than $13/TB.

If you’re building any kind of storage array, NAS, or even just want future-proofing, that 14TB drive is objectively better value. You get 3.5x the capacity for less than 3x the price. Plus you’re using one drive bay instead of needing multiple smaller drives, which means:

  • Fewer points of failure in your array
  • Lower power consumption (one drive vs. three)
  • More room to grow when you inevitably need more space

The Sweet Spot Changes Constantly

This is exactly why I built HDDHunt. The best price-per-TB shifts weekly — sometimes daily. A drive that’s $15/TB today might drop to $11/TB during a sale, or a different model entirely might take the crown.

Right now in April 2026, the sweet spot for raw capacity tends to hover around 12-18TB drives. That’s where manufacturers hit the best economies of scale, and it’s where retailers compete hardest on price. Check the best HDD deals page — I update it hourly.

When Price Per TB Isn’t Everything

I’ll be honest: price per TB is the primary metric, but not the only consideration. You should also factor in:

  • CMR vs SMR: For NAS and RAID, you want CMR. SMR drives are cheaper per TB but perform terribly in multi-drive arrays. I wrote a full comparison of CMR vs SMR if you want the deep dive.
  • Warranty length: A 5-year warranty drive at $14/TB can be better value than a 2-year warranty drive at $12/TB, depending on your risk tolerance.
  • Workload rating: Enterprise drives like the Seagate Exos or WD Ultrastar are rated for 550TB/year workloads. Consumer drives top out around 180TB/year.
  • Use case: If you’re buying a single external backup drive, price per TB still matters, but you might also care about portability or bus power. Check our external hard drive deals.

How I Track It

On HDDHunt, every drive listing shows price per TB front and center. I pull prices from Amazon US and UK hourly, calculate the per-TB cost, and sort everything so the best value floats to the top. No sponsored placements, no paid rankings — just math.

You can browse by use case:

The Bottom Line

Every time you’re about to click “buy” on a hard drive, take five seconds to divide price by capacity. Or better yet, just check HDDHunt — I already did the math for you.

The drives with the best price per TB today won’t be the same ones next month. That’s why I track it obsessively, so you don’t have to.

  • Jake