WebDAV allows quick updating of files on Blackboard through the familiar Windows Explorer interface. I'm not sure if this method will work on on other operating systems than Windows.
The first step is to find the URL for your Blackboard section. This video (which has no sound) shows the process in Blackboard version 8 which we currently use. Watch it full screen.
In Learning Edge/Blackboard 9.1, you can find the URL in a slightly different way.
When you have the URL for your Blackboard section, you can add it to your network places following these instructions.