There are three ways to upload files/folders to Thru Explorer:
Prior to upload, a user should navigate to the target folder using the tree view in the left panel or using the file view in the right panel.
Drag and Drop
To upload the files or folders to Thru Explorer, drag and drop the file or folder into the right panel or on top of folder name in the left panel. Transfer Manager will start and upload the file.
Upload via Thru Explorer Toolbar Menu
Click Upload menu and select a file or a folder to upload.
Upload via Right-Click Menu
Right-click on the file or folder that you would like to upload.
Once a file or a folder is selected, click the Open button to start the upload. This will start the Transfer Manager and perform the upload as shown below: