CrystalDiskMark is a disk benchmark software that evaluates the performance of storage devices such as hard drives, solid-state drives (SSDs), and USB drives on Windows systems. It measures various aspects of disk performance, including sequential and random read/write speeds, providing insights into how well a storage device performs under different workloads.CrystalDiskMark is commonly used by enthusiasts, IT professionals, and hardware reviewers to evaluate and compare the performance of storage devices, aiding in informed purchasing decisions and performance optimizations.