If you have a Private folder tools enabled, you can access the vault you would like to upload the document, then follow these steps:
1. Click on the Private section.
2. Right-click or click on the plus button.
3. Click on Upload Private Documents.
4. Select the location. (*Optional - Click on Toggle Document Visibility to confirm verify other documents inside the location selected.)
5. Click Upload
1. Find the location.
2. Drag & Drop directly to the folder.