OneDrive File Issues

Why OneDrive Uses Several Gigabytes of iPhone Storage and How to Fix It

Rana GarciaRana Garcia Oct 23, 2026 868 views

Question details

The user wants to know why the OneDrive iOS app consumes a large amount of local iPhone storage and how to minimize this space usage while ensuring files remain safely in the cloud.

Why OneDrive Uses Several Gigabytes of iPhone Storage and How to Clear It
Product
OneDrive
Device & OS
iPhone (iOS)
Scenario
Managing cloud storage synchronization to free up local device storage on an iPhone.
Observed behavior
The OneDrive app uses several gigabytes of local iPhone storage because it caches files and keeps local copies of synchronized photos and documents.
Before you start

Ensure all your important photos and documents are fully synced to the OneDrive cloud by verifying them on the web version before deleting any files from your iPhone.

Solution 1Recommended

Free Up iPhone Storage by Removing Local Copies

Manually remove local copies of synced files and clear the device's recently deleted folder to reclaim physical storage space.

When you upload files from your iPhone to OneDrive, the original files remain on your local device. To actually save space, you must delete the local copies after a successful cloud upload.

1
Upload files to OneDrive

Ensure all desired photos, videos, or documents are completely uploaded to your OneDrive app folders.

2
Verify files online

Open a web browser, log in to your OneDrive account, and confirm that your files are securely stored in the cloud.

3
Delete local copies

Open your iPhone's native Photos or Files app and delete the items that are already backed up to OneDrive.

4
Empty the recently deleted folder

Navigate to the 'Recently Deleted' section in your Photos or Files app and permanently delete those items to instantly free up the physical storage.

Free Up iPhone Storage by Removing Local Copies
Verification is Key: Always double-check that your files are visible on OneDrive via a web browser before deleting them locally from your device.
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Frequently Asked Questions

Does deleting a photo from my iPhone delete it from OneDrive?

Generally, if you are using the Camera Upload feature in OneDrive, deleting a photo from your iPhone's local storage does not delete the backed-up copy in the OneDrive cloud. However, always ensure the backup is complete before deleting.

Why does the OneDrive app size grow over time on my iPhone?

As you open and view documents, photos, or videos in the OneDrive app, it caches these files locally for faster loading in the future. Over time, this cache accumulates and can consume several gigabytes of iPhone storage.

Can I clear the OneDrive app cache directly on my iPhone?

iOS does not have a native 'Clear Cache' button for third-party apps like Android does. To clear the OneDrive cache, you can either sign out and sign back in, or completely uninstall and reinstall the app.

How do I ensure files are only kept in the cloud and not on my phone?

Upload your files directly to OneDrive, verify they appear in the cloud via a web browser, and then manually delete the original files from your iPhone's local storage (including emptying the 'Recently Deleted' folder).