If you want to backup files and folders in Windows 10, there is a free built in utility from Microsoft included names, Windows 10 Backup with File History. In the video below we explain how to set it up, how to change the advanced configuration and how to troubleshoot it.
The Win10 Backup troubleshooting relates to:
RECONNECT YOUR DRIVE
Your files will be temporarily copied to your hard drive until your reconnect
Your file history drive was disconnected for too long
and the solution is to plug in the backup drive you were using.