If you are using Windows 10's Fall Creators Update (version 1709 and later), OneDrive's Files On-Demand feature will keep Backblaze from being able to back up the OneDrive folder. Disabling this feature allows Backblaze to back up the OneDrive folder.
OneDrive's Files On-Demand feature frees up space on your hard drive by keeping the files in the OneDrive folder online, rather than saved to your computer. Backblaze cannot back up files that are not saved on your computer.
To disable OneDrive's Files On-Demand feature, follow these steps:
1. Find the OneDrive cloud-like menu icon in your Notification Tray at the bottom right corner of your screen. You may need to click the up arrow to expand more icons. Right click on the OneDrive menu icon, and select Settings.
2. On the Settings tab in the OneDrive Settings, uncheck the box in the Files On-Demand section that says "Save space and download files as you use them."
3. You will get a notification like the one shown below, reporting that all files stored in OneDrive will be downloaded to your computer. Click OK to dismiss this notification, then click OK in the OneDrive Settings for your changes to take effect.
Backblaze will automatically start backing up your OneDrive folder once you have made this change. The next scan it performs will pick up those files and start uploading them. If your computer remains on and awake for 24 hours with your backup set to Continuously, and you do not see any new files scheduled for back up and do not see any OneDrive files in your backup online, please contact support for further assistance by submitting a ticket here.