If you need to check and test your hard drive disk or erase files on your flash drive, then you can always download the appropriate utilities. They are completely suitable for disk surface diagnostics, space analysis, bad sector checking, repairing errors, tweaking, formatting, and partition. The most of them are absolutely free, easy-in-use, and don’t require third-party software. You can launch these tools, read the help information and execute operations you need without learning tutorials. However, there are cases when you need to dive into the details of hard drive programs to use complicated features.