This scan is designed to show which files are taking up space on your system. The default scan will show files over 50 MB in size. In the File Finder results view, you can use the slider at the top right of the results window to select a different size by which to sort - if you want to review smaller or larger files only. In many cases you may wish to keep the files listed, but this view allows you to investigate what is taking up space on your hard drive, and we've found that oftentimes you'll be surprised what files take up the most space, and with this view you can now review them to see if you wish to keep such large files or not.