Current baobab ring chart and treemap chart show only directories. Occasionally directories are smaller than single files included in the same parent directory. In such cases seeing the disk space eating files is more important. Thus deciding which files/directories to show in the chart should only depend on the size of the file/directory and not the type of the node. Additionally, making files and directories look different in a visualization may turn out useful, but this is not too important. Getting the disk eaters visible to user is.