Folder Size 2.4 is a File Management product from foldersize.sourceforge.net, get 4 Stars SoftSea Rating, Folder Size is a convenient shell extension that adds a 'Folder Size' column to the Windows Explorer which displays - you guessed correctly - the total size of the folder in the details view. You can sort the column just like any other column, and use it to replace the standard File Size column since it also displays the size of individual files. A simple enhancement that should have probably come with Windows from the start.

The new column shows not only the size of files, but also the size of folders. It keeps track of which folders you view, and scans them in the background so you can see complete size of all files within the folder. It's very useful for cleaning up your disk. Once you get used to having that information available, a directory listing simply looks incomplete without it. The license of this file & disk software is Freeware, you can free download and free use this File & Disk software.