PDF Opening Issues

Why Adobe Acrobat Reader Copies OneDrive PDF Files on iOS

Adam Davis Oct 19, 2026 869 views

Question details

The user wants to understand why selecting the 'Copy to Adobe Reader' option on an offline OneDrive file creates a duplicate file instead of directly opening the existing copy.

Why Adobe Acrobat Reader Creates Copies of OneDrive PDF Files on iOS

Product: Adobe Acrobat Reader, OneDrive
Device & OS: iOS
Scenario: Opening an 80 MB offline PDF file from OneDrive using Adobe Acrobat Reader on an iOS device.
Observed behavior: The application creates a duplicate copy of the file on the local device instead of reading the existing offline OneDrive file.

Before you start

Check the available storage space on your iOS device, especially if you are working with large PDF files, to accommodate any copied versions.

Solution 1Recommended

Understand the Expected Behavior of 'Copy to' on iOS

The 'Copy to' command on iOS intentionally duplicates files across app sandboxes for security and independent processing.

When you select 'Copy to Adobe Reader' for any file, iOS explicitly transfers a duplicate into Adobe's private local storage space. Because Apple utilizes strict application sandboxing, Adobe Acrobat Reader cannot directly access OneDrive's local offline cache.

Therefore, a secondary copy must be generated for the app to open, process, and edit the file independently.

Locate the file in OneDrive

Open the OneDrive app on your iPhone or iPad and find the PDF file you wish to view.

Access the Share Sheet

Tap the three dots (More icon) next to the file or tap the Share icon to open the native iOS share sheet.

Acknowledge the copy action

Observe that tapping 'Copy to Adobe Reader' is an explicit command to duplicate the file into Adobe's isolated app container.

Understand the Expected Behavior of 'Copy to' on iOS

Storage Consideration: Since your file is 80 MB, creating a copy will consume an additional 80 MB of your local iPhone or iPad storage. Remember to delete this copy later if space is limited.

Solution 2

Open Directly Using the iOS Files App

To prevent duplicating large PDFs, you can access OneDrive directly through the native iOS Files app integration.

Manage and Read PDFs Seamlessly with WPS Office

Avoid storage clutter and manage your PDF files efficiently. WPS Office offers seamless cloud integration on iOS, allowing you to access, read, and edit OneDrive files directly without generating unnecessary local copies.

1. Install WPS Office: Download and install WPS Office from the iOS App Store.
2. Navigate to the Cloud tab: Open WPS Office and tap on the 'Cloud' or 'Files' tab at the bottom of the screen.
3. Connect OneDrive: Select 'Add Cloud Storage' and log into your Microsoft OneDrive account.
4. Open and edit seamlessly: Browse your OneDrive folders directly within WPS Office and open your PDFs to read or edit them without creating duplicate local copies.

Native cloud integration with OneDrive and the iOS Files appFull compatibility with Adobe PDF and Microsoft Office formatsLightweight application footprint saving device storageRobust editing, highlighting, and annotation tools

microsoft office alternative - wps office

Frequently Asked Questions

Does the duplicated file in Adobe Reader automatically sync changes back to OneDrive?

No. Files opened via the 'Copy to' option on iOS are treated as independent local files. Any edits or annotations made in the Adobe Reader copy will not automatically sync back to your original file in OneDrive. You must manually upload the edited copy back to OneDrive.

How can I delete the copied PDFs to free up space on my iPhone?

Open the Adobe Acrobat Reader app on your iOS device, tap on 'Files', and select 'On This iPhone' or 'On This iPad'. Find the duplicate PDF file, swipe left on it, and tap the red delete (trash can) icon to remove it and free up storage space.

Can I avoid duplicating large files when opening them on iOS?

Yes, by utilizing the native iOS 'Files' app and accessing the OneDrive location through it, you can view and edit files in-place using supported applications. This bypasses the need to use the 'Copy to' function.

Why can't Adobe Reader access the OneDrive offline cache directly?

Apple's iOS employs strict application sandboxing for security and privacy. This architecture prevents one app from directly reading or modifying the internal storage or cache of another app. Data must be explicitly passed between apps using tools like the Share Sheet, which typically results in file duplication.

PDF Troubleshooting