The interface of MyDiskTest is notoriously simple, often featuring a "one-click" start button. However, users should be aware that many versions were originally developed in Chinese; while English patches exist, the visual layout remains utilitarian. Furthermore, because the tool performs "destructive" testing—writing data to the entire drive—users must back up any existing files before starting a full expansion test. Conclusion
If you get constant errors during the test, the drive might have physical "bad blocks." You can use the Bad Block Scanning feature to pinpoint these areas. mydisktest v242 portable