How to Clear OneDrive Mobile Cache Without Deleting Cloud Files in OneDrive for Business

The OneDrive mobile app stores temporary files on your device to speed up browsing and opening files. Over time, this cache can grow large and cause the app to run slowly, display outdated file versions, or fail to sync changes. Clearing the cache removes these temporary copies but leaves your actual cloud files untouched in OneDrive for Business.

This article explains why the cache builds up and how to clear it safely on both Android and iOS devices. You will learn the exact steps to free storage space and fix app performance issues without losing any data stored in the cloud. The methods shown here only affect local cached data, so your files remain fully available online.

If your OneDrive mobile app is sluggish, showing errors, or running out of device storage, following these steps will resolve those problems. The process takes less than two minutes and requires no special permissions beyond standard app settings access.

Why OneDrive Mobile Cache Builds Up and How It Affects Performance

The OneDrive mobile app caches file previews, thumbnails, and recently opened documents on your device. This cache reduces load times when you browse folders or open files repeatedly. On Android, the app stores this data in a private app directory. On iOS, the cache is managed through the app’s internal storage system and the iOS Offline Files feature.

As you open more files and previews, the cache grows. A large cache consumes device storage and can cause the app to become unresponsive, display stale file versions, or fail to sync properly. The cache does not affect your actual cloud files. Clearing it removes only the local temporary copies, not the originals stored in OneDrive for Business.

The key distinction is between cached files and offline files. Cached files are temporary copies automatically created by the app. Offline files are files you explicitly mark for offline access. Clearing the cache does not delete offline files on iOS or Android. On iOS, the Offline Files section stores files you have intentionally downloaded for offline use. Clearing the cache from the app settings removes only the temporary cache, not your offline files.

Steps to Clear OneDrive Mobile Cache on Android

1. Open the OneDrive app
   Tap the OneDrive icon on your Android device to launch the app. Ensure you are signed in to your OneDrive for Business account.
2. Go to app settings
   Tap your profile picture or initials in the top-left corner. Then tap the gear icon labeled Settings.
3. Select Clear Cache
   Scroll down to the Storage section. Tap Clear Cache. A confirmation message appears stating that cached files will be removed but your files will remain in the cloud. Tap OK to confirm.
4. Restart the app
   Close the OneDrive app completely by swiping it away from your recent apps list. Reopen OneDrive. The app will rebuild its cache as you browse files.

If the app still behaves slowly after clearing the cache, use the Android system-level cache clear method.

1. Open Android Settings
   Go to your device’s main Settings app. Tap Apps or Application Manager depending on your Android version.
2. Find OneDrive in the app list
   Scroll through the list of installed apps and tap OneDrive.
3. Clear the cache
   Tap Storage & cache. Then tap Clear cache. Do not tap Clear storage because that will sign you out and delete app data.
4. Return to OneDrive
   Open the OneDrive app again. Your sign-in session remains active, and your cloud files are intact.

Steps to Clear OneDrive Mobile Cache on iOS

iOS does not expose a direct Clear Cache button inside the OneDrive app. Instead, you must use the Offline Files setting or reinstall the app.

1. Open the OneDrive app
   Tap the OneDrive icon to launch it. Sign in to your OneDrive for Business account if you are not already signed in.
2. Go to app settings
   Tap your profile picture in the top-left corner. Then tap the gear icon for Settings.
3. Remove offline files
   Tap Offline Files. You will see a list of files you have explicitly saved for offline access. Tap Remove All at the top of the screen. This deletes all locally stored offline copies but does not affect the cloud versions.
4. Close and reopen the app
   Swipe up from the bottom of the screen to open the app switcher. Swipe the OneDrive app card away. Open OneDrive again. The cache is now cleared.

If the app still has performance issues, offload the app using iOS system settings.

1. Open iOS Settings
   Tap the Settings app on your iPhone or iPad.
2. Go to iPhone Storage
   Tap General, then tap iPhone Storage or iPad Storage.
3. Select OneDrive
   Scroll through the list of apps and tap OneDrive.
4. Offload the app
   Tap Offload App. A message explains that the app will be removed but its documents and data will be kept. Tap Offload App again to confirm.
5. Reinstall OneDrive
   After offloading, tap Reinstall App to download the latest version from the App Store. Your sign-in information and cloud files remain intact.

If OneDrive Still Has Performance Issues After Clearing Cache

App still shows outdated file previews

Clearing the cache removes thumbnails and previews, but the app may still display stale data from a corrupted local database. On Android, go to Settings > Apps > OneDrive > Storage & cache and tap Clear storage. This action signs you out and resets all app data. You must sign in again, but your cloud files are unaffected. On iOS, offloading the app as described above achieves the same result.

OneDrive fails to sync after clearing cache

If sync stops working, the app may have lost its connection to the OneDrive service. Force close the app and restart your device. Then open OneDrive and pull down on the file list to trigger a manual sync. If sync still fails, sign out of the app and sign back in using your OneDrive for Business credentials.

Device storage not freed after clearing cache

On iOS, the Offline Files section stores files you have explicitly downloaded. If you have many offline files, removing them frees significant space. On Android, cached thumbnails and previews are usually small. If storage is still low, check the OneDrive app data size in Android Settings > Apps > OneDrive > Storage & cache. If the app data is large, tap Clear storage to reset the app entirely.

Cache Clearing Methods Comparison: Android vs iOS

Item	Android	iOS
In-app cache clear option	Settings > Clear Cache	Not available
System-level cache clear	Settings > Apps > OneDrive > Storage & cache > Clear cache	Settings > General > iPhone Storage > OneDrive > Offload App
Effect on offline files	Offline files are not removed	Offline files are removed if you use Remove All
Sign-out required	No, unless you tap Clear storage	No, unless you delete the app
Time to complete	30 seconds	1-2 minutes

Clearing the OneDrive mobile cache on Android or iOS is a safe and effective way to improve app performance and free device storage. The methods shown here remove only temporary files and leave your OneDrive for Business cloud files untouched. If your app continues to misbehave, offloading or resetting the app data will resolve deeper issues without data loss. For ongoing performance, periodically clear the cache every few months or whenever the app feels sluggish.