To do this, right click on My Network Places in your explorer menu and click on Map Network Drive.
You will get a screen which is something like the screen shot below. In that click on Sign up for online storage or connect to a network server.
Clicking on the link should bring up another screen as shown below, In this click on next which will take you to a screen which verifies your internet connection, once that is done you will get an option to Choose another network location as shown below, highlight that option and click on next.
In the next screen you will be asked to specify the Internet or Network location, in that box add https://www.box.net/dav and click on next, you will be prompted to enter your box.net user name and password, enter the information and click on the Ok button.
If the login is successful you will see another window which asks you to specify a name for the network drive I have entered it as Techie Buzz Box.net, you can name it accordingly.
If all goes well you will see the confirmation screen as shown below Clicking on finish will mount this drive to your network places and you can simply copy paste files to those drives from your Windows Explorer to your Box.net mounted drive.
You can easily access the mounted drive by going to My Network places the next time. You can copy and paste your files to the mounted drive or copy from your mounted drive to your local machine, dosen’t this make it easy to share your files online with different users.
Note: It will ask you for your authentication details while you try to use it.