PDF Editing Issues

Fix 'This Document Has Been Modified' Error in Acrobat on iPad

Steven Parker Oct 18, 2026 868 views

Question details

The user encounters an error preventing them from saving annotations made to a Google Drive PDF using Adobe Acrobat on an iPad.

How to Fix 'This Document Has Been Modified' Error When Annotating Google Drive PDFs on iPad

Product: Adobe Acrobat / Google Drive
Device & OS: iPad
Scenario: Annotating a PDF file stored in Google Drive using the Adobe Acrobat app on an iPad.
Observed behavior: The app displays the error message: 'This document has been modified outside Acrobat. Do you want to create a local copy?' and prevents saving changes directly to the original cloud file.

Before you start

Make sure your iPad has a stable internet connection to allow Google Drive to sync properly, and verify that you have the latest versions of both Adobe Acrobat and Google Drive installed.

Solution 1Recommended

Create a Local Copy to Save Your Annotations

Accept the prompt to create a local copy, ensuring your current edits are not lost, and then manually upload it back to Google Drive.

When the background sync from Google Drive interrupts Acrobat's saving process, the safest immediate action is to secure your edits locally before troubleshooting the connection.

Accept the prompt

Tap 'Yes' or 'Create a Copy' when the error prompt asks if you want to create a local copy of the modified document.

Save to iPad

Choose a destination on your iPad's internal storage, such as the 'On My iPad' folder, and save the PDF.

Re-upload to Google Drive

Open the Google Drive app, navigate to your desired folder, tap the '+' icon, and manually upload the newly saved annotated PDF from your local storage.

Create a Local Copy to Save Your Annotations

Data Saved: Creating a local copy ensures that none of the annotations or edits you just made are lost due to the sync conflict.

Solution 2

Reconnect Your Google Drive Account in Acrobat

Refreshing the connection between Adobe Acrobat and Google Drive can resolve background syncing conflicts.

Seamless PDF Annotation

Annotate and Sync PDFs on iPad with WPS Office

Avoid third-party sync errors by using WPS Office to seamlessly read, annotate, and save PDF documents directly on your iPad. It offers smooth integration with cloud services, ensuring your edits are securely synced without 'modified outside' conflicts.

1. Download WPS Office: Install and open the WPS Office app on your iPad.
2. Connect Google Drive: Go to the 'Cloud' or 'Files' tab and link your Google Drive account.
3. Open the PDF: Locate and open the target PDF directly from your Google Drive within WPS Office.
4. Annotate the document: Use the 'Annotation' tools to highlight text, draw, or add notes to the file.
5. Save changes: Tap 'Save' to instantly sync the annotated file back to Google Drive without conflict.

Directly annotate PDFs with highlighters, pens, and text boxes without sync conflicts.Fully compatible with standard PDF formats and Adobe Acrobat files.Seamlessly connect and sync with Google Drive, iCloud, and Dropbox.Lightweight app optimized for iPadOS and Apple Pencil workflows.

microsoft office alternative - wps office

Frequently Asked Questions

Why does Acrobat say the document was modified outside the app?

This happens when Google Drive's background sync temporarily locks or updates the file's metadata while Acrobat is still trying to write changes to it, causing a version conflict.

How can I prevent sync conflicts on my iPad in the future?

You can prevent this by downloading the PDF to your iPad's local storage before annotating, and then uploading the final version back to Google Drive once you are finished.

Are my annotations lost when this error occurs?

Not necessarily. If you accept the prompt to 'create a local copy', your current annotations will be saved to that new local file, which you can later upload to your cloud storage.

Does this error happen with iCloud or OneDrive as well?

Yes, it can occasionally happen with any cloud storage provider if the connection drops or if the cloud app attempts to sync the file simultaneously while it is actively open in your PDF editor.

PDF Troubleshooting