This is just great on its own as I get information shown below. It is basically data like this at the Database/FileGroup/File levels
Database/Filegroup/File name
Size
Free size
Max size
Free of Max size
Size as a percent at the instance level
Free size as a percent at the instance level
Max size as a percent at the instance level
Free of Max size as a percent at the instance level
Read on to see how Jana makes use of this data, as well as where you can get the code.