Keep your hard disk free from unwanted junk files There exists many kinds of temporary files, backup files, log files, cache files and other files of a similar nature that slowly eat up your hard disk space. CleanDisk will help you automate the task of removing most such unwanted files. Using a quick and easy to use process it will scan your hard disk(s) for unwanted files and then assist you in deleting them. It's as easy as that!