SSD vs HDD: What's the Difference and Which Is Faster?

How traditional hard drives work

A traditional HDD (Hard Disk Drive) stores data on spinning magnetic platters. A read/write head physically moves across the platters to access data — similar to a record player. This mechanical process makes HDDs relatively slow, particularly for the small random reads and writes that are common in normal computer use.

How SSDs work

An SSD (Solid State Drive) has no moving parts. Data is stored on flash memory chips, similar to a USB memory stick but much faster. Because there is no physical movement involved, SSDs can access any piece of data almost instantly — typically 10-100 times faster than a spinning hard drive for everyday tasks.

Real-world speed difference

The difference in everyday use is dramatic. A computer with an HDD typically takes 60-90 seconds to boot Windows. The same computer with an SSD typically boots in 10-15 seconds. Applications open in a fraction of the time. Large file copies complete faster. The overall feeling of using the computer is transformed.

Price and capacity

SSDs cost more per gigabyte than HDDs. A 1TB SSD costs roughly £60-80, while a 1TB HDD costs around £30-40. For most people, a 500GB SSD is sufficient for the operating system and main applications, with external storage for large files like photos and videos.

Should you upgrade?

If your computer still has a spinning hard drive, upgrading to an SSD is almost certainly the best value upgrade you can make. It is often cheaper than buying a new computer and the performance improvement is immediate and dramatic. Cerebro Scan can confirm whether you have an HDD or SSD and show its current health status.

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