WebDrive is a proprietary file transfer software engineered by South River Technologies.
The following pdf by South River Technologies goes over how to use WebDrive.
WebDrive – South River Technologies.

Q & A

Q: Empty Folders once connected. Or Can’t connect to WebDAV server, 500 Internal Server Error
A: Erase, and then re-type your credentials in WebDrive.

In the lower-right corner of the screen, in the notification area, right-click the WebDrive icon.

Select Disconnect.

In the lower-right corner of the screen, in the notification area, right-click the WebDrive icon.

Select Exit.

Start WebDrive.

Double-click the Hosting connection.

In the Username: text box, clear the text, and type your VT Username, which is the first part of your @vt.edu email address.

In the Password: text box, carefully type your VT Username passphrase.
(If you have forgotten your passphrase, follow the instructions at Reset VT Username (PID) Passphrase.)

Click OK.

South River Technologies Support Response: here

.