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Other PDF Issues

Fix Adobe Fill and Sign Storage Space Error on iOS and Android

Phi Hung VoPhi Hung Vo Oct 22, 2026 868 views

Question details

Users are unable to share signed PDF documents from their mobile application due to a recurring false storage limit error.

How to Fix the Adobe Fill & Sign Storage Space Error on iOS and Android
Product
Adobe Fill & Sign
Device & OS
iOS and Android
Scenario
Attempting to share a filled or signed PDF document directly from the mobile application.
Observed behavior
The application fails to share the file and displays the message 'Could not share file. Your device does not have enough storage space', even when the device has hundreds of gigabytes of available storage.
Before you start

Verify your device's actual available storage capacity in the system settings and ensure you have a stable internet connection before troubleshooting.

Solution 1Recommended

Perform Basic App Troubleshooting and Update

Rule out document-specific glitches and software bugs by testing alternative files, restarting the application, and ensuring it is up to date.

This false storage space error is often caused by a software bug in specific versions of the application (such as version 1.5.0 on Android) or a caching issue when generating the shared file.

1
Test with a different file

Try opening and sharing a completely different PDF file within the app to determine if the error is specific to a corrupted document.

2
Restart the app and device

Force close the Fill & Sign application completely from your recent apps list, then restart your iOS or Android device to clear temporary system memory.

3
Check for app updates

Open the Google Play Store or Apple App Store, search for the application, and tap 'Update' if a newer version is available with bug fixes.

4
Contact official support

If the error persists despite having sufficient storage, contact Adobe Support directly and provide them with your specific app version, OS version, and file details.

Perform Basic App Troubleshooting and Update
Temporary Workaround: If you urgently need to send the file, try saving the PDF locally to your device's internal storage first, then use your device's built-in File Manager app to locate and share the document.
WPS PDF Fill & Sign

Use WPS Office to Fill, Sign, and Share PDFs Seamlessly

Bypass persistent sharing bugs and false storage errors by managing your PDFs within WPS Office. The app offers built-in PDF tools to effortlessly add text, insert digital signatures, and share files directly from your mobile device.

  1. 1. Open your PDF in WPS Office: Launch the WPS Office mobile app, tap the 'Files' tab, and select the PDF document you need to fill or sign.
  2. 2. Access Fill & Sign tools: Tap on the 'Tools' menu at the bottom, navigate to the 'PDF Edit' or 'Annotations' section, and use the text or signature tools to complete your form.
  3. 3. Save and share instantly: Once your document is complete, tap the 'Share' icon at the top of the screen to send the document securely without encountering storage limitation errors.
Reliable PDF filling and signing tools without false storage space errors.Highly compatible with all standard PDF formats and Adobe Acrobat documents.Lightweight, all-in-one office suite that saves your device's memory.Seamless file sharing via email, messaging apps, or cloud storage directly from the app.
microsoft office alternative - wps office

Frequently Asked Questions

Why does the app say I don't have enough storage space when I have plenty available?

This is typically caused by a software bug where the application miscalculates available memory or fails to request proper storage permissions when trying to export and share the PDF file.

Will clearing the app cache fix the 'Could not share file' error?

In some instances, going to your device settings, finding the application, and selecting 'Clear Cache' can resolve temporary conflicts that trigger this sharing failure.

Are there other apps I can use to sign and share PDFs on my phone?

Yes, alternatives like WPS Office provide comprehensive PDF tools for mobile devices, allowing you to fill forms, add digital signatures, and share files without encountering the same storage errors.