TreeSize Professional shows you the size, allocated and wasted space, the number of files, 3D charts, the last access date, the file owner and permissions, the NTFS compression rate and much more information for several folders or drives you choose. Find out which folders are the largest on your drives and recover megabytes on your disks. TreeSize Professional is a powerful and flexible hard disk space manager for Windows 2003/2008/2012/XP/Vista/7/8/8.1.