I had problems at first, but I finally solved the problem and it is now working fine. Here is what you need to do. Click on the windows button (formerly Start), in the box that says "Search programs and file", type in "Computer Management" without the " ". In the main window (the big window", Double clcik on "Storage", then double click on Disk Management. You should no be looking at a list of all of the drives attached to and recognized by Windows Disk Management, if you scroll down you should see your free agent drive listed, you need to right click on it and select "Mark Drive as Active", after marking active is complete, you will need to right click on it again, and then select "Change drive letter and path", after this is complete, your drive will be usable.