Tech Guide: Eradicate duplicate files

Stop repeating yourself: Duplicate file finder Ever find that you have multiple copies of the same file when you only need one? Here's some utilities that scan drives, find duplicate file, and let you get rid of them.

Last week I got an e-mail from a reader looking for a good program to find duplicate files. He had important files on two different drives and knew that there was significant duplication between them but didn't know how to fix the problem. Moreover, he wanted to transfer all of his files to a new hard drive he had just bought.

I did a little research and found several programs that quickly scan drives and let you compare files to know which ones you can delete. Not only do these apps offer a solution to the problem above, they let you free up a significant amount of drive space by getting rid of duplicates.

Here are the three I found most useful for syncing up drives and finding duplicates.

NoClone finds duplicates by performing a byte-to-byte comparison of files. This program worked great for tracking down and deleting duplicate digital photos on my hard drive. You can also use this one to de-dupe files over a network. (Shareware/Windows)

Directory Report 19 quickly catalogs large drives and lets you sort by several different criteria to find which files you need and which are duplicates. This one is my favourite because you can also easily print directories for hands-on comparisons and export to Excel to view in a spreadsheet format. (Shareware/Windows)

FolderMatch lets you compare the contents of two folders on any drive, even CDs. Use this one to sync between hard drives, computers, or your laptop. It also offers a helpful wizard to guide you through the process. (Shareware/Windows)

What do you think? How do you manage duplicate files on your system? TalkBack to me below!

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Talkback 7 comments

  1. ok i'll show my age. a long time favourite for doing this is xtree gold, there was also a dos app file synch. a good linux console tool for doing it is midnight commander. windows explorer would do it if it had a "no to all" option instead of ju Anonymous -- 21/11/04

    ok i'll show my age. a long time favourite for doing this is xtree gold, there was also a dos app file synch. a good linux console tool for doing it is midnight commander. windows explorer would do it if it had a "no to all" option instead of just "yes to all" when copying files.
    cheers
    b

  2. Is there no free / open source software versions? Drop me a line if you know of one :). Anonymous -- 03/01/05

    Is there no free / open source software versions? Drop me a line if you know of one :).

    1. Yes there are Open Source alternatives Anonymous -- 22/08/07

      You can find Open Source alternatives at www.sourceforge.net
      Just search for "duplicate files"

  3. Try Duplicate Finder this is also very good tool to find and eliminate true duplicate files. Duplicate Finder search duplicates using byte by byte or crc32 to give you most accurate and faster results. Good interface with lots of fea Anonymous -- 11/05/05

    Try Duplicate Finder this is also very good tool to find and eliminate true duplicate files.

    Duplicate Finder search duplicates using byte by byte or crc32 to give you most accurate and faster results.

    Good interface with lots of features.

    www.ashisoft.com

  4. I like Duplicate File Detective - http://www.duplicate-file-detective.com/ Anonymous -- 25/05/05

    I like Duplicate File Detective - http://www.duplicate-file-detective.com/

  5. absolutely best programme for synchronizing and comparing directories is ExamDiff pro, it falls to the category "absolutely powerful" for me! Anonymous -- 18/06/05

    absolutely best programme for synchronizing and comparing directories is ExamDiff pro, it falls to the category "absolutely powerful" for me!

  6. Duplicate Finder v3.0 Anonymous -- 25/01/06

    Hi Everybody,

    Duplicate Finder v3.0 fast in searching Duplicate Files.

    Duplicate Finder does CRC32, byte/byte and Same FileName comparisons and allows you to batch mark and batch delete or move the dupes. Main view shows all file details so you can combine that with a quick review to be sure you're not moving or deleting anything you don't want to. It also have popup resizable picture viewer to view picture files.

    Search duplicate file contents regardless of file name, Duplicate MP3s, photos, and any file type can be searched.

    Duplicate Finder protect system files and folders to exclude them from
    scanning. It means you are not going to delete files which is required by the operating system.

    New Advance Marking system lets you select files by date, size, and several other criteria. Duplicate files can be deleted, moved, or copied.

    http://www.ashisoft.com

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