If you right click a folder and select properties Explorer will recursively scan every file and display the total size as it progresses in the properties window you can see in the screenshot on the right. The easiest and most well known method is to use the context menu and check the properties of the folder. Nevertheless, Explorer does provide some features to help users calculate folder sizes. The column for size is already there for files so it would just be a matter of writing the code to calculate the folder size when the option is enabled.

Regardless, it seems odd that they didn’t provide it as an option in Explorer’s settings. Unfortunately, this takes time and uses up a lot of the systems processing power. To show the size of a folder, Windows Explorer would have to read ever file within every sub-folder before it could return a result. The most likely reason it does not display folder sizes is that it would slow down browsing of the file system significantly. This seems to be a feature that users want but it has never been fully implemented by Microsoft.windows folder properties size One of the peculiarities of Windows Explorer, seeing that it is a file management application, is that it does not have the ability to display folder sizes. It is essentially a task-based file management application that is central to the functioning of Windows. Microsoft’s Windows Explorer has been one of its core applications since Windows 95.

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