Study Finds Nearly 50% of Hard Drives Fail Too Early

Conventional wisdom says that a typical hard disk drive (HDD) should last about five years. This was recently challenged by a study by Secure Data Recovery, which analyzed more than 5,000 failed hard drives and found that the median drive only survived 8,687 hours under stress. It’s been almost 362 days; less than a fifth of its expected lifespan. In total, 49.8% of drives failed with less than a year of constant use.

However, it is important to place this study in context. It only considered hard drives from a small number of manufacturers and, crucially, only looked at drives that had already failed. In other words, this study says nothing about the lifespan of a typical hard drive. To determine this, organizations like Backblaze purchase new hard drives and run them until failure, monitoring all possible variables and reporting annual failure rates as a proportion of the total storage array. In 2025, Backblaze reported an annualized failure rate of 1.13%, meaning about one in 88 drives failed that year.

Unfortunately, even with all this data, it’s still not easy to tell how long an individual hard drive will last. A peer-reviewed study analyzing 440,000 drives tested by Backblaze found that the risk of failure increases based not only on the age of the drive, but also on its manufacturer, temperature, and capacity.

Sooner or later, every hard drive will fail. If you have a hard drive that you have been using for several years, you should start thinking about replacing it. If it clicks, hangs during file transfers, or loses data, the drive may already be dying. In these situations, it is crucial that you take immediate steps to recover and backup data, starting with the most important files. In the future, consider following the 3-2-1 rule for data backups to limit the impact of a disk failure.

One of the reasons hard drives don’t last very long is that they have internal moving parts that experience wear and tear. This is why SSDs (which have no moving parts) tend to last longer; eight years on average. But that’s not the only advantage: because reading and writing are handled digitally, SSDs are typically several times faster than hard drives. NVMe drives are even faster than SSDs, but are also more expensive, so they may not fit everyone’s budget.

If you really want to maximize the life of your hard drive, there are several statistically significant ways to do so. First, choose a provider with low failure rates, like HGST. Larger drives also tend to be more reliable, with each additional terabyte of memory reducing risk rates by about 3.4%. Finally, keep an eye on your PC temperature, as each additional degree above 20℃ increases failure rates by approximately 2.1%.