You mark files as available offline in the OneDrive mobile app, but changes made on your PC or by a colleague never appear on your phone. This problem usually happens because the app’s offline cache is stale or because the device has network restrictions that prevent background sync. This article explains why offline files stop updating and provides step-by-step fixes for iOS and Android devices.
Key Takeaways: Fixing OneDrive Mobile Offline File Sync
- OneDrive app > Offline files > Refresh: Manually pull down on the Offline list to force a sync check.
- iPhone Settings > OneDrive > Background App Refresh: Enables the app to download updates even when it is not open.
- Android Settings > Apps > OneDrive > Mobile data & Wi-Fi: Allows background data usage so offline files can update on cellular networks.
Why OneDrive Mobile Offline Files Stop Updating
When you mark a file as available offline on the OneDrive mobile app, the app downloads a local copy to your device. The app then watches for changes on the server. If the server version changes, the app should download the new version in the background. This process fails for three main reasons.
First, the app requires a stable internet connection to check for updates. If the device switches between Wi-Fi and cellular or enters a low-signal area, the sync check may not complete. Second, operating system power-saving features can stop the OneDrive app from running in the background. On iOS, Background App Refresh must be enabled. On Android, the app must have background data and unrestricted battery access. Third, the OneDrive app itself may have a corrupt local cache. When the cache is damaged, the app cannot compare the local and server file versions, so it never triggers an update.
Steps to Force OneDrive Mobile Offline Files to Update
Use these steps in order. Test after each step by opening the offline file and checking the modification date.
Step 1: Manually Refresh the Offline Files List
- Open the OneDrive app
Tap the OneDrive icon on your home screen or app drawer. - Go to the Offline tab
On iPhone, tap the Me icon at the bottom right, then tap Offline files. On Android, tap the profile icon at the top left, then tap Offline files. - Pull down to refresh
Place your finger at the top of the file list and drag downward. Release when the spinning indicator appears. Wait 10 seconds. If any file has a newer server version, the app will download it.
Step 2: Enable Background App Refresh on iPhone
- Open iPhone Settings
Tap the Settings app on the home screen. - Tap OneDrive
Scroll down the settings list and tap OneDrive. - Turn on Background App Refresh
Tap the toggle so it shows green. This allows OneDrive to check for file updates even when the app is not on screen.
Step 3: Enable Background Data on Android
- Open Android Settings
Swipe down from the top of the screen and tap the gear icon, or find Settings in the app drawer. - Tap Apps
Then tap See all apps or App management, depending on your device model. - Tap OneDrive
Scroll the list and tap the OneDrive app entry. - Tap Mobile data & Wi-Fi
On Samsung devices, this is called Data usage. On stock Android, tap Background data. - Enable background data
Tap the toggle so it is on. On some devices, also disable Data saver for OneDrive by tapping the toggle next to Allow background data usage.
Step 4: Disable Battery Optimization for OneDrive on Android
- Go to Apps > OneDrive again
From Android Settings, tap Apps, then tap OneDrive. - Tap Battery
On some devices, this is called App battery usage or Power usage. - Select Unrestricted
Tap the option that says Unrestricted or Don’t optimize. This prevents the system from killing the OneDrive process when the phone enters low-power mode.
Step 5: Remove and Re-add the Offline File
- Open the Offline files list
Follow the same steps as in Step 1 to reach the Offline tab. - Find the file that is not updating
Tap and hold the file name until a menu appears. - Tap Remove from Offline or Make available online-only
This deletes the local copy but keeps the file on the server. - Navigate to the file in the OneDrive folder view
Tap the Files tab at the bottom of the app and find the file. - Tap the three dots next to the file
Then tap Make available offline. The app downloads a fresh copy from the server.
If OneDrive Mobile Offline Files Still Do Not Update
OneDrive shows the file as offline but the content is old
This happens when the local cache is corrupted. Clear the app cache without deleting your account. On iPhone, go to Settings > OneDrive > Clear Cache. On Android, go to Settings > Apps > OneDrive > Storage > Clear Cache. Restart the app and refresh the Offline list.
Offline files disappear from the list after a reboot
This is not a sync failure. OneDrive must re-authenticate after a device restart. Open the OneDrive app and sign in again. Your offline files reappear within 30 seconds if the connection is stable. If they do not, tap the Offline tab and pull down to refresh.
OneDrive does not sync offline files on cellular data
By default, OneDrive on iOS only updates offline files over Wi-Fi. To change this, go to iPhone Settings > OneDrive > Cellular Data and turn it on. On Android, go to OneDrive app settings > Transfer files only over Wi-Fi and turn that toggle off. After changing the setting, pull down to refresh the Offline list.
Manual Refresh vs Automatic Background Sync: Key Differences
| Item | Manual Refresh | Automatic Background Sync |
|---|---|---|
| Trigger | User pulls down on the Offline list | System event or timer wakes the app |
| Network requirement | Any connection at the moment of pull | Background data must be enabled |
| Battery impact | None outside the refresh moment | Small periodic drain if many files change |
| Reliability | Always works if network is available | Depends on OS power management settings |
| Best use case | When you need the latest version immediately | Keeping files updated without user action |
Manual refresh is the most reliable way to get the latest version of an offline file. Automatic background sync is convenient but requires correct OS permissions and a stable network. For critical files, make it a habit to pull down the Offline list before you open a document.
You can now force OneDrive mobile offline files to update by refreshing the list manually and enabling background app settings. Start by pulling down the Offline list. If that does not work, check Background App Refresh on iPhone or background data on Android. As an advanced tip, set OneDrive to Unrestricted battery on Android and turn on Cellular Data on iPhone to ensure offline files update on any network.