Your hard disk stores information according to how you use your computer. This information can, at times, be copied, which means it takes up more space on your drive.
By analyzing your hard drive, Fast Duplicate File Finder lets you quickly find duplicate files.
You can limit the search to certain directories, so you can search just your user folder, and not all of the system files.
Once you've selected the duplicated files you can either erase them, or move them to a temporary folder where you can access them if ever something should go wrong.
Lastly, Fast Duplicate File Finder lets you save your search as project, so that you can perform the same analysis later.