CrystalDiskMark is a small open-source program that tests PC hard drives on the Windows platform. The program is based on the Microsoft Diskspd tool and tracks read and write speeds through the file system depending on the volume. Use the link on this page to download the official version of CrystalDiskMark free.

The free program CrystalDiskMark compares the performance of your hard disks and memory cards. Measures read and write speeds of incoming data. Supports HDDs, SSDs, USB drives, and NAS storage.

The program performs several cycles of writing to the disk, analyzes the data and shows the maximum speed of reading and writing. This helps check the reliability of the specified data when purchasing new hardware for your PC, or when checking your existing device. 

You can customize some parameters in the program: the size of the text file, the number of threads or queues, the time between test cycles, and the number of cycles. The result is displayed in MB/s, GB/s, IOPS and microseconds.

Running tests:

  • Seq Q32T1. The test is used to calculate file copying speeds for files 500MB and larger.
  • 4KiB Q8T8. The test shows how fast the operating system cache is processed.
  • 4KiB Q32T1. This test is used to test the disk for writing and reading blocks of data of a few kilobytes.
  • 4KiB Q1T1. The test is used to test the disk where the system is installed.

How to download CrystallDiskMark software 

Follow the link on this page, the file will be automatically saved to your download folder. Run the file, accept the license agreement and select the folder to install the program. Then wait until the installation is complete and a program shortcut appears on your desktop. You can then open the program and start testing.


CrystalDiskMark is a utility designed to test your hard drive. On the official website of the developer, the program is presented by a charming anime mascot named Suisho Shizuku.