Hard Drive Price History: Price per TB for Internal and External HDDs
Internal 3.5" hard drives cost $36.25 per TB on amazon.com today, down 1.9% in 90 days. External hard drives cost $43.68 per TB, nearly unchanged (+0.1%) over the same period. Each line in the chart is the median price per TB of the 10 cheapest new drives of that type on that day (as of Oct 28, 2026 at 1:17 AM UTC).
How have hard drive prices changed in the last 90 days?
90 days ago the index for internal 3.5" drives stood at $40.19 per TB, today it is at $36.25. Its 90-day low was $34.37, its high $40.65. External drives moved between $41.57 and $45.93 per TB.
Hard drive price index on amazon.com, as of Oct 28, 2026 at 1:17 AM UTC
| Index | Per TB | 7 days | 30 days | 90 days | 90-day low |
|---|---|---|---|---|---|
| Internal 3.5" HDD | $36.25 | +1.0% | +2.4% | -1.9% | $34.37 |
| External HDD | $43.68 | -1.0% | -1.2% | +0.1% | $41.57 |
The percentages compare the same drives on both days, so they can differ slightly from the start and end points of the line. Used and refurbished drives are never part of the index.
Which hard drive size is cheapest per TB?
Right now the lowest price per TB for a new internal drive is in the 6 TB size at $23.08 per TB. Large drives are often cheaper per TB, but not always. The index column is the median of up to 10 cheapest new drives per size, which is what the chart shows under "By size". Sizes with only a few offers sit higher than the overall index.
New internal hard drives by size, price per TB, as of Oct 28, 2026 at 1:17 AM UTC
How is the hard drive price index calculated?
ratioDB takes the 10 cheapest new drives of each type on amazon.com every day and uses their median price per TB as the index value. Price per TB is the price divided by capacity, with 1 TB equal to 10^12 bytes. Multipacks are divided by their total capacity, prices do not include shipping. The full method is on the methodology page.
Hard drive price history FAQ
Are hard drive prices going down?
Not at the moment: Internal 3.5" drives are at +2.4% per TB over 30 days and -1.9% over 90 days. This page shows measured prices, no forecast. Causes and the outlook are covered in Hard drive prices.
Are external hard drives cheaper per TB than internal ones?
Not right now: external drives cost $43.68 per TB and internal 3.5" drives $36.25 per TB in the index. External models include a case and a USB connection.
How often is the chart updated?
ratioDB checks amazon.com prices about every 2 hours. The chart shows 1 value per day, the table always uses the latest prices.
Can I download the data?
Yes. "Download data (CSV)" gives you the daily index values shown in the chart, without single offer prices. You may use them with a link to ratioDB as the source.
Where can I find the cheapest hard drive right now?
The hard drive price list shows all hard drive offers on amazon.com sorted by price per TB, with condition and a price timestamp on every row.