1Tree is a 100% FREE software that lets you quickly see all drives/directories/files size in 1 tree view, so as to let you to do the manual disk cleaning work easily.

1Tree loads your local and network drives, folders and files with their sizes (sorted by size in descending order), and provides you with the common commands (e.g. Delete, Move to, Rename) and a few special commands (e.g. Get Full Path of Resource) for drives/files/folders. So, with 1Tree, you can do the manual disk cleaning work easily.

In fact, it is similar to UNIX/Linux du command, or you can think it is a GUI du tool for Windows.