Category Archives: Fast Duplicate File Finder

Find Duplicate Files

Fastest Duplicate Finder – FDFF 5.5.0.2

Fast Duplicate File Finder has proven to be the fastest duplicate finder on the market. As we provide a free version, it is used by millions of users. They have used and tested it for more than a decade. Therefore it is a reliable bug-free tool that has proven itself over the years and is the number one choice of many professionals.

Although there is not much to improve we are always trying to squeeze up as much as possible and improve the performance further. This release improves performance and fixes a minor annoyance. There was an issue where the progress-bar was displaying “100%” for a very long time. This is not something that had to do with the quality of the scan or results. It was only a display problem, but some users thought that the application was stuck especially when scanning large drives.

Fastest Duplicate File Finder

Fastest Duplicate Finder

Fastest Duplicate File Finder – Scan Methods

  1. 100% Equal Files – This is the best mode for a proper duplicate scan. While it is not the fastest of all the supported modes, it is the one that guarantees to list true duplicates. Many tools on the market may perform faster as they use CRC checksums. Such tools produce incorrect results and may lead to permanent loss of data. For example, the CRC or checksum of the file that many such tools are using may identify completely different files as duplicates.
  2. Similar Files – This mode can find similar documents. It is very precise, as a result, it is the slowest of all. In short, you should use it on a smaller subset of files. This is mode can find similar excel, word, txt, pdf, archive and other documents. It can not find similar photos or similar audio files. This article: Which Duplicate File Finder To Choose? explains why we have developed dedicated tools for those tasks.
  3. Similar File Names – this is a fast scan mode that can find similar or duplicate file names. For example, it is useful if you want to find files that are named like: “My Essay (1).doc”, “My Essay March.doc”, “My Essay 2019.txt” and so on. A tutorial for the above two modes is available here: Find Similar Files and Similar File Names
  4. File Size – searching for duplicates by file size is not a reliable method. However, in many cases, it can be helpful. It is extremely fast and you can use it for very large drives. If the files are large the chance for two files to be different and to have exactly the same size gets very low. In conclusion, for large files it is acceptable to use it. As always we do recommend that you review the results prior to removing any files.

Fastest Duplicate File Finder – Tutorial

If you are new to the tool take a look at this tutorial: How To Find Duplicate Files?

We are glad to hear your thoughts and suggestions. Please share them in the comments section below.

Exclude A Folder From Auto-Check – Set “Source” Folder

Compare Two Or More Folders For Duplicates

Compare Two Or More Folders For Duplicates

How To Exclude A Folder From Auto-Check Or How To Set A “Source” Folder

This information applies to:
Fast Duplicate File Finder
Visual Similarity Duplicate Image Finder
Audio Dedupe

The auto-check feature in the duplicate file finder tools automatically selects all except one duplicate file in each group for move/delete. The feature selects the files based on the defined settings like the oldest/newest, largest/smallest files, ones with lower resolutions for images or lower quality for audio files and so on, but sometimes it is necessary to preserve the files in certain “source” folders and exclude them from the selection. That is quite easy by ticking a check-box in front of the folder name in the folders list.

In the folders list tick the ‘Disable Automark For This Folder’ checkbox for the corresponding folder.

Exclude From Auto-Check (Auto-Mark)

Exclude From Auto-Check (Auto-Mark)

A related article can be found here: Compare Folders For Duplicates – How To Compare “Source” And “Target” Folders

How To Compare Two Or More Folders For Duplicates

Compare Two Or More Folders For Duplicates

Compare Two Or More Folders For Duplicates

Compare Folders For Duplicates – How To Compare “Source” And “Target” Folders

This information applies to:
Fast Duplicate File Finder
Visual Similarity Duplicate Image Finder
Audio Dedupe

There are situations where merging folders or comparing two or more folders is necessary. In such cases a “source” folder should not be checked for duplicates and should only be compared with one or more “target” folders. Comparing two or more folders for duplicates is very easy using the “Exclude From Self Scan” feature in the folders list.

Compare Folders For Duplicates

Disable “Self-scan”

If self-scan for folder ‘VSD’ is disabled (as displayed in the image above) the files inside that folder will not be compared against each-other – they will be compared only with files that are located inside the other folders that are added in the folders list.

If self-scan is disabled for the folders ‘VSD’ and ‘VSD1’ the files in ‘VSD’ will be compared with the files in ‘VSD1’ and vice-versa instead of comparing all the files in ‘VSD’ and ‘VSD1’ against each other.

As some of our users still have doubts how this feature works, here are some extra examples:

Scenario1:
Folders in the folder list:
[ ][ ]vsd
[ ][ ]vsd1
All files in both folders are compared against each other.

Scenario2:
Folders in the folder list:
[ ][x]vsd
[ ][ ]vsd1
Files inside ‘vsd’ will be compared only with the files in other folders – in this case ‘vsd1’. They will not be compared with each other. The files in ‘vsd1’ will be compared with the files in all other folders and they will be compared among each other too – which is the difference with ‘vsd’.

Scenario3:
Folders in the folder list:
[ ][x]vsd
[ ][x]vsd1
Files in ‘vsd’ will not be compared against each other. Files in ‘vsd1’ will not be compared against each other. Files in ‘vsd’ will be compared with the files in ‘vsd1’ and vice-versa. If there were more folders in the list files in ‘vsd’ would be compared with those too. Also files in ‘vsd1’ would be compared with them too.

Ticking ‘Disable self scan’ tells the application not to compare the items inside the corresponding folder with each-other.

Self-scan can be disabled for a folder by ticking the checkbox in front of the corresponding folder name. There are two columns in front of the folder name column. The column with the icon that illustrates a red circle with a white dash inside contains the “Disable self-scan” check-boxes.

A related article can be found here: How To Exclude A Folder From Auto-Check Or How To Set A “Source” Folder

Duplicate File Finder – How to Filter Files and Folders

Free Duplicate File Finder

Duplicate File Finder

Duplicate File Finder – How to Filter Files and Folders When Searching For Duplicate Files

When looking for duplicates it is sometimes necessary to filter the results by file type, folder location, file attributes like date or size, file name and other properties – this is possible using the filtering functionality inside Duplicate File Finder.

The filtering settings should be applied prior to starting a scan. This can lead to a much quicker scan if one is interested only in certain file types or locations.

There are plenty of filtering options that can be applied, inside Fast Duplicate File Finder.

Enabling and disabling the filtering option when searching for duplicate files

The filter button is a two state button at the top of the application represented with a funnel icon. When it is off pressing the button will display the filtering options.

  • If the options are applied using the OK button the filtering tool button will stay pressed denoting that filtering is applied.
  • If the filtering dialog is canceled the filtering tool button will remain unpressed denoting that no filtering is applied.
  • If the filtering tool button is pressed, pressing the button for the second time will disable the filtering and the tool button will go up.

Pressing the button for the second time, when it is in its unpressed state will display the filtering window where the last filter can be edited and applied.

 

Find Duplicate Files - Filter Duplicate Files

Duplicate File Finder Filtering Options

Including or Excluding Matches From Duplicate Search

At the bottom of the filtering dialog there is an option that determines whether the items matched by the filtering options will be included or excluded from the results.

Filtering Duplicates By Folder

The folders pane can be used in order to filter the duplicates by location. There are button at the bottom to add or remove folders. The remove button works on the currently selected item.

Filtering Duplicate Files By Type – File Extension

The File Extensions panel provides options to filter files by type. Extensions in format *.ext (asterisk dot extension) can be added in the list. Use the check-boxes in the list in order to toggle file types on or off. The unused (unchecked) items will be removed automatically when the application is restarted.

Filtering Duplicates By File Attributes – File Date, File Size and File Name

The File Attributes panel provides options to filter duplicates by certain file properties. Using the File Size Bigger Than and File Size Smaller Than options in combination with the global Exclude/Include option can search for duplicates inside or outside a certain file size range.

The same applies for the date range and files older, newer or inside/outside a certain period of time can be included or excluded in the results.

There is also an option to filter the files by name which also supports the standard file name wildcards – asterisk that denotes multiple characters or question mark that denotes a single character. For example A*LOT?OF* – will match all files starting with A followed by some other characters then containing LOT followed by a single character that is followed by OF which is followed by any number of other character. Another example is Copy of * – this will match all files that start with “Copy of” and so on.

Using the filter is straightforward and provides a lot of flexibility. Setup the filter options and make sure tho apply them using the OK button in the filtering dialog. The filtering tool bar button will stay pressed (the one with the funnel icon) denoting that the filtering is active. Once the filtering is enabled start the scan to search for the duplicate files that match the filter options.

How To Compare Folders For Duplicates

If the above filtering options are not sufficient there are options to Exclude Folders From Auto-Check and Exclude Folders From Self-Scan. Those will let you compare folders easily.

Take a look at Duplicate Photo Finder and Duplicate Songs Finder for dedicated tools. This small article can be useful in order to chose a duplicated finder.