Duplicate File Finder

How to troubleshoot the issues when removing duplicates

When you try to remove duplicates with Duplicate File Finder, the application may give you the notification that some files were not removed for various reasons. In this article, we will explain why you face some issues and how to troubleshoot them.

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Files on NTFS formatted disk can be found but can’t be removed

It may happen that, when you are trying to scan an NTFS formatted disk, Duplicate File Finder gives you a notification that you can find duplicates but cannot remove them. You will see the following notification:

This means that you can scan the volume to find duplicates, you can preview the duplicates, but you will not be able to remove them. NTFS formatted disks require special drivers to be installed on Mac to make it possible to operate files from the drive. If you try to remove duplicate files from a disk of NTFS format, you will get the following message:

After clicking the Close button, you will see such a messages in the Removal window:

How to fix this issue and remove files from NTFS formatted disk?

NTFS-volume is a Windows OS default file system format and has some restrictions for operating files when you open it on your Mac. When your folder is located on an NTFS volume, you cannot make any modifications or remove files on such a drive unless you install a special driver app for NTFS disks.

Thus, to be able to remove duplicates from a volume of NTFS format, you should install a driver app for NTFS disks. Such apps will allow you to change and delete files on Mac from NTFS disk volumes. There are a large number of apps on the Internet (Tuxera, Paragon, Mounty for NTFS, Fuse, Seagate, and so on), designed to help you solve such issues. You can choose paid or free apps depending on your requirements.

  1. Before installing a special driver for NTFS formatted disk, we recommend that you close Duplicate File Finder and save your session.
  2. After installing the driver, check if you can operate (move or remove) files on your disk.
  3. As soon as you have Read & Write permission for your disk, you can launch Duplicate File Finder, restore your session or rescan your disk and start removing duplicates from NTFS volume.

Files on a disk with Read Only access can be found but can’t be removed

When you are trying to scan an external drive with Read Only permission, Duplicate File Finder gives you a notification that you can find duplicates but cannot remove them. This means that you can scan the volume to find duplicates, you can preview the duplicates, but you will not be able to remove them.

You can click on Continue to find and view your duplicates. If you try to delete duplicates from an external disk with Read Only permission, you will get the following notification:

After clicking the Close button, you will see such a messages in the Removal window:

How to fix this issue and remove duplicated from Read Only disk

If your duplicates are located on a volume with Read Only access, you will need to change the volume permission and grant Write access. This will allow you to remove duplicates from the scanned disk.

The reasons for this issue:

  • The disk may be mounted with third-party software tools as Read Only.
    This means that if your duplicates are located on such a disk, you cannot remove or move files on it, you don’t have Write access to make any changes on it. To be able to remove duplicates, you need to remount your disk as Read & Write using the same software you used to make it Read Only. Also, you can use other programs for this task, such as Tuxera, Paragon Mounty for NTFS, and so on.
  • The duplicates are located on a Micro SD with Read Only access.
    Another reason why you can’t remove duplicates is that you have a Micro SD card with an option to lock and unlock the card right with a special switch button on it, check whether your card is unlocked.
  • You scanned a Disk without the possibility of recording on it.
    There are some disks which by default don’t provide a possibility to write to them. Once you saved any data on such disks, then you can’t make any changes on them, including removing duplicate files.

Files or folders can’t be removed due to lack of permission

It may happen that Duplicate File Finder displays a message that some files were not moved to Trash due to lack of permission.

Such messages appear when the application does not have the right to remove duplicate files without your confirmation. For example:

  • You try to remove duplicate files or folders which have Read Only access.
  • You try to remove duplicate files located in a folder with Read Only access.

If you downloaded Duplicate File Finder from the website, the app will require your confirmation in the Finder. Click the Confirm button to allow the application permission to remove the selected duplicates.


If you downloaded Duplicate File Finder from the App Store, you will see the message that you don’t have permission to remove the file. You will need to manually change the permission settings for the file or folder.


After clicking Close, you will see the following message in the Removal window:

How to fix this issue and remove duplicates with lack of permission?

To be able to remove duplicates in this case, you need to change the permission and grant Write access to duplicate files or folders where these files are located.

To check and change the permission status of a file or folder, follow these steps:

  1. Click the Show in Finder button in the popup message for the unremoved file. Or manually find and open the duplicate file or the folder where the duplicate is located in FInder.
  2. Make a right click on a file or folder and select Get Info in the context menu.
  3. On the info window in the Sharing & Permission section, you will find the information about which type of access you have. Right here, you can change the user privilege. But please note, you would need to have the administrator rights for changing the permission type.
  4. Click the Lock icon.
  5. Enter your username and your password.
  6. Select Read & Write from the privilege type.
  7. If you change the privilege for the folder, then click the Settings icon and click Apply to enclosed items.
  8. After changing the privilege settings, open Duplicate File FInder and click to remove the selected files.

Files can’t be removed due to being locked

Sometimes, when you are trying to remove duplicates with Duplicate File Finder, you get the message that the files were not removed (or moved to Trash) due to being locked.
If you downloaded the Duplicate File Finder from the website, then you would need to click Confirm to allow the app to unlock these duplicates and permanently remove them or move them to Trash.

Such a message appears when the files and folders you want to remove are locked or located in locked folders. For example:

  • The file you want to delete is locked.
  • The folder you want to delete is locked
  • The unlocked file you want to delete is located in the locked folder.
  • The unlocked folder you want to delete is located in another locked folder.

Duplicate File Finder does not have the right to remove locked items without your permission. So click the Confirm button to allow the app to unlock these duplicates and permanently remove them or move them to Trash. You will need to enter your admin user password to confirm this operation.
If you use Duplicate File Finder downloaded from the App Store and you are trying to remove locked duplicates, you will get the message that the files could not be moved to Trash because you don’t have permission to access them.

How to fix this issue and remove locked duplicates?

Due to the App Store does not allow applications to raise user rights to operate locked files, you would need to manually check if your duplicates are locked or if they are located in a locked folder. Here are the steps for this:

  1. Click Get Info from the context menu for the file or folder and look for it in the General Information section.
  2. If the folder is locked you can’t remove the files in it. Uncheck this option to be able to modify or remove the folder.
  3. After getting the permission to operate the files, you will be able to remove your duplicates with one click using Duplicate File Finder.

Files can’t be removed because your external disk doesn’t have a Trash folder

It may happen that Duplicate File FInder is not able to remove selected files to Trash because your disk does not have the Trash folder. In this case you are able to remove the file permanently only, without moving it to Trash.
You will see the following message:

If you are sure you don’t need this file anymore, click Confirm to remove the duplicate permanently.

If you click Cancel, then you will see the notification next to unremoved files in the removal results window.


Files can’t be removed due to being located on a Remote disk

The Remote disk is a network-attached folder or volume which can be located on a server, networked computers or external network storage.
Please note that it may happen, when you are trying to remove the duplicates from a Network Disk that the Duplicate File Finder app may show you the following message:

Why do you get this notification?

The most common reason is that, by default, network volumes do not contain a Trash bin. But, when you click to remove duplicates with Duplicate File Finder, the application has to move the selected files to Trash (its default removal setting). As a result, your files can’t be moved to the temporary Trash folder and will be removed permanently. That’s why the Duplicate Files Finder shows you the confirmation message to make sure you understand that these files will be non-restorable after confirmation.

If the selected files couldn’t be removed, you will see the following message:

The reason for that may be any of the issues described above. So you need to check the Remote disk for these issues:


The file can’t be removed as the duplicates were modified after last scan

In the case you restored the previous session, but recently removed any duplicate copy of your file without Duplicate File Finder, you will see this message.

We want to make sure that you do not lose important data. To warn you from deleting all copies of the file, the app informs you to prevent their removal. Please, rescan your files to resolve this issue.


Files can’t be removed as they are the unique copies.

If you selected all copies of the file for removal, Duplicate File Finder will inform you in order to prevent the removal of all copies.

We want to make sure that you do not lose important data. To warn you from deleting all copies of the file, the app informs you to prevent their removal. Please, rescan your files to resolve this issue.


Files can’t be deleted from Photos due to not having access to your library

When trying to remove similar images in the Photos library, you may get an issue and see a red exclamation mark next to a file name in the removal results window. Also, the files that couldn’t be removed from the Photos Library is highlighted with the red color.

How to fix this issue and remove similar pictures from Photos library?

Such an issue happens when you didn’t give Duplicate File Finder access to your Photos app. This is important to allow Duplicate File Finder to look for identical and similar images in the Photos library on your Mac.

If you want to grant the Duplicate File Finder app access to Automation to remove unwanted duplicate pictures, complete the next steps:

  1. Open System Preferences.
  2. Select Security & Privacy.
  3. Click on the Privacy tab and select the Automation section.
  4. Click the Lock to make changes.
  5. Select Photos under the Duplicate File Finder app to provide access to the documents and data of the Photos app.
  6. Click the Lock to save changes.


Then, open Duplicate file Finder and try to remove unneeded duplicate photos again.


The selected photos cannot be removed due to the Photos app is running

If the Photos app is running while you are trying to remove pictures located in the Photos library, you will see such a message.

You need to close the Photos app to allow Duplicate FIle Finder to remove similar images from your Photos library. Please, close the Photos app and try again.


Unknown error

In some cases when removing duplicates, you may get a message about permanent removal of your files.

Please, check the permission for your Trash folder. You need to have Read & Write permission and it does not have to be locked to be able to remove files to Trash.

If your Trash is unlocked and you have permission to remove files to Trash, but still get this issue, then you can remove the selected files permanently only. If it’s ok for you, click Confirm. But please note that the app will ask for the administrator password to confirm the removal.

If the removal couldn’t be completed or you are using Duplicate File Finder downloaded from the App Store, you will see the following notification.

In this case, please, contact our support team. We will help you to find the reason for the issue and solve it.

 


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