How to find and delete duplicate files on Android

Why Android phones collect duplicate files

Duplicates rarely come from one place. The usual sources are:

• Messaging apps save their own copy of every photo, video and document you receive, so a file shared in two chats can exist twice.
• Downloading the same file again creates names like report (1).pdf next to the original.
• Editing a photo or video often saves a new copy alongside the original.
• Copying files to an SD card or a computer and back leaves the same files in more than one folder.
• Restoring a backup can bring back files that were already on the phone.

Option 1: use the file app that came with your phone

Many phones already include a basic duplicate check. Files by Google shows duplicate files as a cleaning suggestion, and Samsung's My Files app has a storage analysis screen that lists duplicates. Menu names change between versions, so look for Clean, Storage analysis or Duplicate files.

Note: Built-in tools usually look for exact copies. Photos that look the same but were saved at a different size or quality can be missed.

Option 2: find duplicates with Fylo

Fylo is a free, ad-free file manager for Android. Its storage cleanup finds large, old and duplicate files, and its duplicate file finder includes visual matching for images. Deleted items go to Fylo's Recycle bin first, so a mistake can be undone.

1. Install Fylo from Google Play and allow file access when Android asks. A file manager needs this permission to scan your storage.
2. Open Fylo's storage cleanup tools and start a duplicate scan.
3. Review each group of matches. Open a file if you are not sure which copy you need.
4. Select the copies you do not need and delete them. Keep at least one copy of everything you want.
5. Open the Recycle bin to check, then empty it to free the space.

How to decide which copy to keep

• Keep the copy in the folder you actually use, such as DCIM/Camera for photos or Documents for files. Delete the copies in Downloads or in messaging app folders.
• When two photos look the same, keep the larger file. It usually has the higher resolution.
• Check the dates. The oldest copy is usually the original; newer ones are often re-downloads or exports.
• Leave Android/data and Android/obb alone. Those folders belong to apps, and deleting from them can break the app or remove its data.

A note on WhatsApp and other messaging apps

Messaging apps keep the media you receive in their own folders. If you delete a photo there, it can disappear from the chat too. To keep a photo, copy or move it to your own folder first, then remove the duplicate from the messaging folder. WhatsApp and Telegram also have their own storage screens that show which chats use the most space.

Before you delete in bulk

Deleting hundreds of files takes seconds, and so do mistakes. Back up anything irreplaceable first, for example to a computer or a cloud service, and delete in batches so you can check the results as you go.

• More ways to free up storage on Android →

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