You can drag files and folders from your computer to upload them to your OneDrive library or SharePoint team site with the modern experience. You can also browse and upload your files using the classic version. For information, see Differences between the new and classic experiences for lists and libraries.
To create and upload files and folders in a library, you must have contributor permissions to the library. If you're not sure what permissions you have, contact your SharePoint Admin. For more information, see Types of files that cannot be added to a list or library.
SharePoint has the ability to upload folders that are built into Microsoft Edge, Google Chrome, and Mozilla Firefox. Internet Explorer doesn't support uploading folders.
Upload files from Explorer to your OneDrive or SharePoint sites library
Open the OneDrive or SharePoint site library.
Select Upload at the top of the Documents library.
In the Add a document dialog box, select Browse to upload an individual file. Depending on the version of OneDrive or SharePoint that you're using, you may also be able to upload multiple files by holding down either the Ctrl or Shift key, and selecting more than one file.
When you've selected the file or files to upload, select OK.
- IMPORTANT: you MUST fill out all the fields or your document will not be visible to others as they will be in a "checked out" status since it would be incomplete.