
There is an option to protect system files and folders which is recommended to be turned on. You can also set which folders you want to exclude from the auto mark. The auto mark algorithm has advanced settings to exclude from auto mark files with user specified extensions, file sizes, file dates and file names.

After the scan process is finished the program shows you all duplicate files in groups and can automatically mark the older files for deletion. You can also preview the files in binary mode. It uses fast binary comparison algorithm and has internal preview supporting a lot of image, video, music and text file formats. The application will compare the content of your files so it will find duplicates even if they are using different file names. Thus, you can find duplicate files by comparing the similarity between them and not just filenames.Fast Duplicate File Finder will find all duplicate files in a folder and its sub folders. They use the matching algorithms that search files by name, tag, size, metadata. These programs support almost all file types, such as ZIP archives, photos, audios, videos, PDFs, folders, subfolders, etc.

