SDExplorer is described as 'free, easy-to-use, but very powerful extension for Windows Explorer. With SDExplorer you can perform all everyday operations with your documents on Microsoft OneDrive™ using Windows Explorer, as if they were on your computer itself' and is an app in the Backup & Sync category. There are five alternatives to SDExplorer for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and Android. The best alternative is Drive File Stream by Google, which is free. Other great apps like SDExplorer are Gladinet (Paid), OneDrive Uploader YellowRobot.XYZ (Free), OneDrive Linux Client (Free, Open Source) and SkyDrive Simple Viewer for WebDAV (Free).
With Drive File Stream, you stream your Drive files directly from the cloud to your Mac or PC, freeing up disk space and network bandwidth. Because Drive files are stored in the cloud, any changes you or your collaborators make are automatically updated everywhere.
Free tool that provides a simple solution for uploading files and folders to OneDrive as easily as possible. Allows to upload large files in the background and to use OneDrive as a backup drive on the cloud.