What should I look for when buying a hard drive?

Focus on price per TB for value, the right capacity for your needs with some headroom, and the right type for the job, such as a NAS or CMR drive for an array. Then back it up. Brand matters less than people think once you have redundancy.

What is the most important factor in choosing a hard drive?

Price per TB, because it tells you how much storage your money actually buys and lets you compare drives fairly. Big drives usually win. After value, match the drive type to your use and make sure your data is backed up.

Does hard drive brand matter?

Less than you would think. Large-scale data shows the major brands are broadly similar on reliability, which tracks the model and cooling more than the logo. Buy on price per TB and protect your data with redundancy and backups.

How Do You Choose a Hard Drive? A Simple Checklist

Published: August 26, 2026

Live answer · Amazon.com

Pulling live prices…

Live data across PricePerGig listings. Prices may change; Updated every few hours.

📊 As of 28 September 2026, the typical HDD on Amazon.co.uk is £153/TB or £0.153/GB across the 3,350 live listings we track, with the widest choice of drives priced around £61.6/TB or £0.062/GB. The best deals on Amazon.co.uk start from about £299 for 8TB (£37.4/TB), £367 for 14TB (£26.2/TB) and £612 for 20TB (£30.6/TB). The current best value is 14TB at roughly £26.2 per TB.

Sourced from real discussions on r/buildapc and r/DataHoarder, cross-checked against live PricePerGig listings.

Standing in front of a wall of hard drives wondering which to pick? Let me give you a simple checklist that cuts through it.

Five things matter, and only five. Get these right and you cannot really go wrong.

Capacity, price per TB, drive type, reliability, and a backup plan. That is the whole list.

The table above shows the live price per TB on your marketplace, which does most of the heavy lifting for you.

1. Capacity, with headroom

Start with how much space you need, then buy a bit more.

Storage use only ever grows, so a drive that fits today is full tomorrow. Buying one size up usually costs little extra and saves you upgrading again soon.

Not sure how much? We dig into that in how much storage do you actually need.

2. Price per TB, your value compass

This is the number that matters most.

Price per TB strips away capacity and tells you how much storage your money actually buys. It lets you compare a small cheap drive against a big pricey one fairly, and big drives usually win.

So sort by price per TB on the live table above and let it guide you. We explain the idea fully in what is a good price per TB right now.

3. The right type for the job

Match the drive to where it lives.

For a desktop or general use, a standard drive is fine.
For a NAS or array, choose a NAS or enterprise drive built for 24/7 use, and make sure it is a CMR model rather than SMR, which can crawl in arrays. We cover that in our guide to CMR, SMR and how we tag drives.
For portability, pick the right size and form factor.

4. Reliability, in perspective

Do not lose sleep over brand.

Large-scale failure data shows the major brands are broadly similar, and reliability tracks the specific model and cooling more than the logo. We go deeper in are bigger hard drives less reliable.

So buy on value, cool your drives well, and do not pay a premium chasing a reliability myth.

5. A backup plan

The step people skip, and the one that saves them.

No drive is a backup by itself. Whatever you buy, keep your important data in more than one place, with one copy offsite.

Get this right and a dead drive is a shrug, not a disaster. See the 3-2-1 backup rule.

The bottom line

Choosing a hard drive comes down to five things: enough capacity with headroom, the best price per TB, the right type for the job, sensible expectations on reliability, and a real backup plan.

Run through that checklist, let the live price per TB table above point you to the best value, and you will buy the right drive with confidence every time. No spec-sheet overwhelm requird.