Emptying your recycle bin doesn't assure complete destruction of data from your hard drive. Windows Operating system only marks the file as deleted, but the data still remains on your hard drive. It can be retrieved using the various software products present in the market. your sensitive data can be misused by someone else. File shredder will make sure that your data is not just marked as deleted but is also deleted permanently.It overwrites the particular clusters/portions where your data was saved and makes sure that all traces of your data are removed from the hard drive.