If you're using OneDrive in Windows 8.1 or Windows RT 8.1, and are having problems with files not uploading or downloading, try these troubleshooting steps.
If you get the following message, you don't need to do anything: "We’re checking all your files to make sure they’re up to date on this PC. This might take a while if you have a lot of files." OneDrive has detected a possible problem and is automatically fixing it.
There might have been a temporary problem with OneDrive and it didn't detect your change.
In the OneDrive app, swipe up from the bottom or right-click. Tap or click Sync.
In File Explorer, press and hold or right-click OneDrive in the left pane, and then choose Sync.
Open the OneDrive app.
Swipe in from the right edge of the screen, and then tap Settings.(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, and then click Settings.)
Tap or click Options, and then turn on Sync files.
If your Internet service provider charges for the amount of data you use, you might have turned off the setting to upload and download files over metered connections.
Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings.(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, click Settings, and then click Change PC settings.)
Tap or click OneDrive.
Tap or click Metered connections, and turn the settings to On.
Open the OneDrive app by tapping or clicking its tile on the Start screen.
Look for a message at the top of the screen or in the upper-right corner.
Tap or click the error text or the View details button.
See more info about the problem and which files couldn't be uploaded or downloaded. Follow any steps that appear.
In File Explorer, files that are stuck syncing will appear with a double-arrow icon that doesn't go away. Any items that have problems will appear with an error icon. To see more info about a problem, press and hold or right-click the item, and then choose View sync problems.
Tap or click Update and recovery.
Tap or click Windows Update, and then tap or click Check now.
If you have problems checking for or installing updates, see Windows Update: Frequently asked questions.
Swipe in from the right edge of the screen, and then tap Search.(If you're using a mouse, point to the lower-right corner of the screen, move the mouse pointer up, and then click Search.)
In the search box, enter Task Manager, and then, in the results, tap or click Task Manager.
If you don't see tabs at the top of the window, tap or click More details.
On the Processes tab, under Background processes, make sure OneDrive Sync Engine Host appears.
If it doesn't, follow these steps:
Open File Explorer, and then press and hold or right-click OneDrive in the left pane.
Tap or click Properties, and then tap or click the Security tab.
Tap or click Advanced.
On the Permissions tab, make sure SYSTEM, Administrators, and your Microsoft account appear, and the Access for each is Full control.
If you don't see your Microsoft account, tap or click Add.
In the Permission Entry for OneDrive window, tap or click Select a principal.
Enter your Microsoft account and tap or click OK. Your Microsoft account should now appear next to Principal.
Make sure that Type is set to Allow
and Applies to is set to This folder, subfolders and files.
Under Basic permissions, select Full control, and then tap or click OK.
In the Advanced Security Settings for OneDrive window, select Replace all child object permission entries with inheritable permissions from this object, and then tap or click Apply and then OK.
Your Microsoft account should now appear on the Security tab.
Tap or click OK, and then restart your PC.
Sign in to your PC again, wait a few minutes, and then check if the OneDrive Sync Engine Host process is running.
If you still have problems with files not syncing, run the troubleshooter or contact customer support. Make sure to provide any details and other symptoms or errors you’ve seen after running the troubleshooter.