Ability to display folder structure in a multi-level system.Displays disk space consumption in various formats (file count, percentage, size, and allocated space).Ability to export the report to a PDF file.If you are wondering where all the disk space is gone! Especially when you get the low disk space error message, then TreeSize Free is the software for you, it will analyze the entire disk showing you a list of all folders and their respective sizes. Features in the paid version (TreeSize Professional).