PDF Opening Issues

How to Fix Adobe Acrobat Reader Creating Duplicate PDFs on Android

Amos Gikunda Oct 19, 2026 869 views

Question details

The user experiences an issue where Adobe Acrobat Reader automatically generates a duplicate copy of a PDF when opened from the Android Files app.

How to Stop Adobe Acrobat Reader from Creating Duplicate PDFs on Android

Product: Adobe Acrobat Reader
Device & OS: Android
Scenario: Opening a PDF file directly from the Android Files app to read or add annotations.
Observed behavior: A duplicate file with a modified filename (e.g., appended with '-1') is created if a file with the same name already exists in the app. Edits and comments are saved to this new duplicate instead of the original file.

Before you start

Before making any changes, verify the exact filename of the PDF you are currently viewing to ensure you know where your recent comments and annotations are being saved.

Solution 1Recommended

Clear or Rename Existing Files with the Same Name

Prevent Adobe Acrobat Reader from creating duplicates by ensuring no files with identical names exist within the app's local storage.

Acrobat Reader creates a duplicate copy to prevent overwriting an existing file. By resolving the naming conflict beforehand, the original file can open normally.

Open Adobe Acrobat Reader

Launch the Adobe Acrobat Reader application on your Android device.

Check Recent Files

Navigate to the 'Files' or 'Recent' tab to view your locally stored PDFs.

Locate the Conflicting File

Find any existing file that shares the exact same name as the new PDF you are trying to open from your file manager.

Rename or Delete

Tap the three-dot menu next to the older file and select 'Rename' or 'Delete' to remove the naming conflict.

Tip: Regularly clearing out your Acrobat Reader app's local library will ensure newly downloaded original files open without duplicating.

Solution 2

Verify Filename Before Adding Comments

Check that you are editing the original document rather than a newly generated copy to ensure comments are saved in the correct place.

Read & Annotate PDFs Smoothly

Use WPS Office to Open and Annotate PDFs on Android

Avoid duplicate file conflicts and confusing annotation saves by using WPS Office. It provides a seamless PDF reading and editing experience on Android, ensuring your comments are always saved exactly where you expect them.

1. Install WPS Office: Download and open WPS Office on your Android device.
2. Browse Files: Tap the 'Files' tab at the bottom of the screen to browse your device storage.
3. Open the PDF: Locate and tap your target PDF file to open it directly in the WPS PDF viewer.
4. Annotate and Save: Use the 'Tools' menu to add highlights or comments, then tap the 'Save' icon to apply all changes directly to your original PDF file.

Edits and comments save directly to the original fileFully compatible with standard PDF formats and Microsoft Office filesLightweight application that saves device storage spaceIntuitive PDF annotation and signature tools included

microsoft office alternative - wps office

Frequently Asked Questions

Why does my saved PDF have a '-1' at the end of the filename?

This happens when Adobe Acrobat Reader detects another file with the exact same name already existing in its recent or local app storage. To prevent overwriting the old file, it automatically creates a duplicate and appends a '-1' to the new file's name.

Where did my comments and annotations go on Android?

If a duplicate file was created when you opened the PDF, your comments were saved to that duplicate copy instead of the original PDF in your Files folder. You will need to check your recent files in the PDF reader app to find the annotated copy.

How can I prevent duplicate PDF files from being created on my Android device?

You can prevent this by ensuring you rename or delete old PDFs in your PDF reader's local library. When the app's library no longer contains a file with the same name, new files opened from your file manager will open as the original rather than a duplicate.

PDF Troubleshooting