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How Much Storage Do You Actually Need?

Published: 6 de julio de 2026

Live answer · Amazon.com

Pulling live prices…

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

📊 A 8 de julio de 2026, el HDD típico en Amazon.es cuesta 206 €/TB o 0,206 €/GB entre los 2,883 anuncios en vivo que seguimos, con la mayor oferta de unidades en torno a 50,9 €/TB o 0,051 €/GB. Las mejores ofertas en Amazon.es parten de unos 320 € para 8TB (40 €/TB), 469 € para 14TB (33,5 €/TB) y 550 € para 20TB (27,5 €/TB). La mejor relación calidad-precio ahora es 18TB a unos 23,8 € por TB.

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

The eternal buying question. How much storage do I actually need?

Here is the honest answer nobody likes: a bit more than you think.

Storage use only ever goes one direction, and that is up. So the goal is to buy enough headroom that you are not upgrading again in six months.

The table above shows live price per TB on your marketplace, because the smart move is to buy big once rather than small twice.

A rough guide by what you do

Let me give you real numbers to anchor on, not vague waffle.

Find your row, then add a chunk on top. You will use it.

Why you should buy bigger than today’s need

This is the bit that saves you money long term.

A drive that is bang on your current size today is full and annoying within a year.

Buying one size up costs surprisingly little extra, because bigger drives have a better price per TB. Meanwhile, upgrading later means buying a whole new drive and shuffling data around.

Headroom is cheaper than a do over. Glance at the live table and you will see the bigger capacity is barely more per terabyte.

One big drive or several small ones?

Short version: one big drive wins on value almost every time.

The fixed costs of a drive, the motor, the casing, the controller, get spread across more storage on a big drive. So the price per TB drops as capacity climbs.

The only reason to spread across several drives is redundancy, not value. And redundancy is about protecting data, not saving money.

So buy big for value, then add a second drive for safety if the data matters.

Do not forget the backup tax

Here is the number people forget to budget for.

If your data matters, you need more than one copy. That means your real storage need is roughly double the raw amount, because a backup is a second copy.

Want 8TB of irreplaceable files? Budget for 16TB of drives so you can keep a backup.

It feels like a lot until the day a drive dies and you are very glad you did.

The bottom line

How much storage you need comes down to your use case plus headroom plus a backup copy.

Pick the rough figure for what you do, round up because usage grows, buy big for the best price per TB using the live table above, and double it if the data is irreplaceable. Do that and you buy the right amount once, instead of upgrading again and again and waisting money each time.

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