What is the speed of a magnetic hard disc?

The speed of a magnetic hard disk drive (HDD) is primarily determined by its rotational speed, measured in revolutions per minute (RPM). Common speeds include 5400 RPM for standard consumer drives and 7200 RPM for higher-performance models. Some enterprise-grade HDDs can go up to 10,000 or even 15,000 RPM. Additionally, the data transfer rate can vary, typically ranging from 80 to 160 MB/s, depending on the drive's specifications and technology.