The Duplicate File Finder by software developer Auslogic is one of the duplicate file finders available for the Windows operating system. The interface has been designed with ease of use in mind. It begins by selecting folders or hard drives that should be checked for duplicates. It is possible to select multiple folders and drives or just one.

The options of the duplicate file scan are configured in the next screen once the folder and drive selection has been made. The options are divided in the three categories matching criteria, advanced criteria and file types.

Matching criteria defines the aspects of the files that should be matched with each other. These are the name, date and time and size by default with the option to add contents as well (resulting in a slower scan) or remove one of the other criteria.

Advanced criteria can be used to filter out files with a size lower than the size specified in this section of the configuration. File types finally makes it possible to only scan specific file types or all files in the selected folders.

A list of results is then displayed after the program finished the scan. File names, sizes, locations and last modified dates are displayed with the option to select some or all of the files so that they can be deleted. The Duplicate File Finder can be downloaded from the Auslogics website.

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Once the folders have been selected they can be immediately checked for duplicates. Once a duplicate has been detected it can be deleted or moved immediately. Other options include the creation of a list of duplicate files and the creation of a batch file. The second option is interesting as well. Files can be compared to checksum files that have been previously generated which results in a faster processing speed. Ideal for instance if you store files that will stay on your system and that you only add new files to.

Clone Spy provides several automatic options on how to handle duplicate files. It can delete older or newer files or files with a longer or shorter file name or path.

The process can be further customized in the program’s options. There the user can include or exclude file types from being included in the scan, if and how file attributes affect the scanning and if specific folders should be ignored.

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Certain file types can be excluded from scan, the default configuration exlcudes dll, sys, vxd and inf files from the scan. You could add more files that are important in your case or remove any of the default ones. You could on the other hand limit the scan to files matching a certain filter. It would be easy to setup a scan that would only scan for images for instance using this filter. (good way to check for duplicates in image collections of 100000+ images)

Last but not least you can leave out files that have a certain file attribute such as read only, system or hidden. System files are excluded from scans by default. A last parameter makes it easy to define a rule that files will not be scanned if the file size exceeds or undercuts a give size.

The lenghts of a scan depends on various factors such as hard drive space, filters that have been set and speed of hard drive. Doublekiller is a clever program that makes it easy to scan through a large list of files and free up disk space in the progress.

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I also have a rather large amount of images on my pc, could well be over 30000 and I always had the impression that there have to be duplicates all over the place. Never had the time to manually check them and delete the duplicates, would take forever.

Therefor I decided to take a look at tools that compare and delete duplicate files automatically. I found two that suit my needs, one is more of a general duplicate finder and one is specifically for images.

Clonespy is able to locate duplicate files even if they have a different file name or size. Its freeware of course, simply unzip to a location and run the file. The program gives you some options how to handle the duplicate files, move them, delete them and exporting a list of the files without removing any.

The second tool which is unfortunately nagware is called Unique Filer. I have not found a freeware tool that is able to perform the same operations as Unique Filer. It is able to find images dupes even if the images have been resized, rescaled, resampled and color corrected. It also finds normal dupes of course, but that’s not what makes it so special.

If you have many images that you downloaded over the years I recommend Unique Filer to you, you can use all its functions without registering, but see a nagscreen all 10 files that you opt to delete. And those are a lot, from my 30000 files more than 5000 have been dupes..

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