OneDrive is popular online file hosting service by Microsoft. You can use OneDrive’s free cloud storage to keep up to 5 GB of your files, or purchase a subscription plan to get more space. In either case, it doesn’t take long before the storage limit is reached. Fortunately you can get rid of useless files, like duplicate photos or documents, from your OneDrive storage to create more space.

In this post we will share two ways to remove duplicate files from the OneDrive Library on a Mac.


OneDrive separator

Find duplicate files in OneDrive

As you know, duplicate files have equal size, type, and content. Sometimes the twin files have the same names. When you copy a file in OneDrive, you see a notification that the file you want to add already exists in OneDrive. However, it is possible to keep both items. By default the number index is added to a copy of a file within the same OneDrive folder, but you can manually rename a duplicate file as well.
onedrive app for mac

If you want to find duplicate files in OneDrive, you can try the following tips:

  • Search for the duplicate file by name. To find unwanted replicas of files by their titles, login to your OneDrive online account → open the folder where you want to search for duplicate files → click Name at the top of the list of files → select A to Z to sort items by name. Skim the list to find files with equal names or the same name with a number index in parentheses. If they are duplicates, their content, type, and size should be the same.
  • delete duplicate files from onedrive

  • Search for duplicate files by size. In case you renamed existing copies, you can try to identify twin files by size. So within the folder with estimated duplicates, arrange the items by Size. If the content and type of files are matched, it’s likely they are duplicates.
  • search duplicate file

  • Search for duplicate files by content. The largest part of most cloud storage data is taken by photos. You can try to find identical images by eye. Within the folder with photos, set the view option to show items as Tiles and sort them by size. It’s very likely that the images with the same size and visual content are duplicate photos.

duplicates in onedrive

Delete duplicate files from OneDrive online

It’s common to rationalize that we will find and remove unwanted duplicates later, but never actually do so. Not this time! Once you have identified all duplicate files in OneDrive, you can easily remove them. For this, tick all unneeded twin files and click on Delete at the top menu of OneDrive cloud storage.
remove duplicate files onedrive

Remove Duplicate Files on OneDrive from a Mac

The previous methods of finding and removing duplicates in OneDrive are tedious. Just imagine that you have 100 GB or 1 TB of data in your cloud storage. With such a large amount of files, you will have to open every single folder, sort files, skim and detect equal files to remove the useless ones. Instead, you can use a special software tool to automatically find and remove duplicate files from your Mac. If you use the OneDrive app for Mac, try the free Duplicate File Finder application to easily and quickly delete duplicate files from your cloud storage.

Duplicate File Finder can scan your folders and find identical files by type, size, and content. Within OneDrive storage, Duplicate File Finder will detect all duplicate photos, documents, videos, and other files among all your folders, as well as identical archives and folders. To remove duplicate files in OneDrive using Duplicate File Finder, take the following steps:

  1. Launch Duplicate File Finder. Click on the Add button or drag and drop the OneDrive folder to the app’s window, then click the Scan button to search for duplicates.
  2. OneDrive storage folder

  3. In the next moment, you will see the scan’s results. You can click on the Duplicate Files button to see all types of twin files in OneDrive at once. Also, you can click on the down-arrow next to Duplicate Files to open the drop-down menu, which allows you to select a certain group of files by type.
  4. program to find duplicate files

  5. Next, within the app’s window you will see the list of duplicates on the left side and a preview window with each item’s info on the right side. You can select each duplicate file step-by-step or click on the Auto Select button to allow the app to automatically choose unneeded copies. Then click on Review & Remove.
  6. find duplicates file

  7. In the next moment, you will see a list of all the items you want to delete from your OneDrive storage. Skim the files and click Remove to confirm the action.
  8. duplicate file remover app

By default all deleted items are moved to the Trash on your Mac. However, in the Preferences of the app, you can select to permanently remove duplicate files from Mac or move to a specific folder.


Cloud storage services allow us to keep tons of information and easily share it with others. Using OneDrive, you can store up to 6 TB of data and share it with family members. However, even this huge online storage account will eventually run out of space. To help you to free up space and organize your OneDrive files, use the free Duplicate File Finder app on your Mac.

You can download Duplicate File Finder from App Store and use it for free. If you would like to get more benefits, such as merging folders, organizing files, and even finding similar photos, use the Pro version of the app, which is available via in-App purchase for $9.99.

Learn how to find and delete duplicate files in Cloud Storages in detail in our previous articles:
How to find and remove duplicate files in Dropbox
How to find and remove duplicate files in Google Drive
How to remove duplicate photos in iCloud