This seems to be a misnomer. It doesn't actually expand your hard drive space. My "C" drive didn't suddenly go from 32M to 64M when I inserted the flashcard. Instead it created an additional removable drive which it labeled "D". Here is the problem. It is removable memory and therefore Windows 7 will not allow you to use it in your library. It is not even an additional hard drive because if it was then you could use the library to include files stored there. Instead every time you have to save a file over there you have to push save on your program and then open your computer and then open your D: drive and then work your way down the hierarchy of the drive until you get to the file location. Have I missed something. Is there someway to make this Disk Expander actually work like a hard drive instead of a removable memory storage location?