Download: TreeSize Free Portable

Finding the folders that are taking up the most space on your hard disk is not easy with Windows Explorer. TreeSize Free Portable is a flexible program that will help find them down.

Read more: Portable app download reviews

Installation is simple. You can run the download to install it in its own folder or it can be installed into the Portable Apps launcher. To do this with this download click on the Apps button and then Install a new App and click on Open.

Alternatively, to ensure you get the latest version of the program, click on Apps in the Portable Apps launcher and then Get more apps.

The interface is fairly clear and easy to use. Some kind of welcome splash screen would be helpful as the option for starting a scan is in the Scan menu. You can either select one of the hard disks or opt to select a particular directory

If a folder requires admin rights to access a message will appear asking if you want to restart as admin. This will make the UAC window appear so it can be given permission to scan the folders.

The 500GB hard disk in our test computer took several minutes to scan. It only has about 88GB free so there were plenty of files to check.

As the name of this program suggests the folders on the computer are arranged as a tree. Click on the small triangle on the left of a folder to expand the entry to show sub folders along with their size. This makes it really simple to find big folders.

A good example of this is the Users folder is normally very big depending on what users have been storing.

Rather than clutter the list with individual files in every folder, they are shown as an entry for Files. This can be expanded as if it were a folder to show the individual files. This is an excellent idea and makes TreeSize Free much easier to use.

There are several ways to customise the way that folders are displayed such as viewing them by percentage of total disk space rather than their absolute size. The size can be shown in KB, MB or GB.

There are some limitations in this free version of TreeSize. It cannot scan network drives and the Personal (US$25) and Professional (US$53) versions can find and remove duplicates.