Step1:Open the OneDrive or SharePoint site library.
Step2: On your computer select Start Windows Start button and then type File Explorer.
Step3:Navigate to the folder with the documents that you want to upload.
Step4:Drag the files to the space in the SharePoint library where it says drag files here. The library should display “Drop here” when you hover the file over it.
Step5:You should see your files appear in the Document library.